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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want one pair of earbuds that covers both a sweaty gym session and a quiet office call, choose RCA EarSwitch 4in1; if you need earbuds that translate live conversations in 165 languages while you travel, choose Rulbovs NE70.
These two are rarely compared for the same reason, and that's the point. Both are true wireless (TWS) earbuds, both pair over Bluetooth, and both come in a charging case. But one is built around fit and versatility, and the other is built around language translation. If you're shopping for "tws earbuds" and these two keep showing up in your tabs, the real question is what you want the earbuds to do for you on a normal day.
• RCA EarSwitch 4in1 — biggest strength: two complete earbud sets in a single case — an open-ear hook pair for sports and a classic in-ear pair for calls and desk work — plus Bluetooth 5.4 and a 20-hour total battery figure with an LED percentage display.
• RCA EarSwitch 4in1 — biggest trade-off: there's no active noise cancellation, so it can't seal you off from a loud room the way a dedicated noise-cancelling model would.
• Rulbovs NE70 — biggest strength: real-time translation across 165 languages (8 with free offline packs), driven by a 1.3-inch LCD touch screen on the case so you don't have to dig out your phone, backed by a 60+ hour total battery figure.
• Rulbovs NE70 — biggest trade-off: it's a specialist tool first and a music earbud second — its 4.5-hour average battery life and app-dependent translation controls won't suit someone who just wants to press play and forget about it.
• Buy the RCA EarSwitch 4in1 if you want one case that handles workouts, commutes and calls.
• Buy the Rulbovs NE70 if your main problem is a language barrier, not a playlist.
The EarSwitch 4in1's whole idea is that you shouldn't have to pick a single earbud shape. The case holds two different pairs: an ergonomic open-ear hook set that sits outside your ear canal, and a classic in-ear set that seals in sound. You swap depending on what you're doing. That's not a gimmick for most people — it maps onto a genuinely common split in how people use earbuds. Open-ear hooks stay put during running, cycling and gym work, and because they don't block the canal you keep hearing traffic, gym announcements and the person spotting you. Then you switch to the in-ear pair when you want to focus on a call or actually hear the low end of a track.
On the tech side, it runs Bluetooth 5.4 with a stated range up to 33 feet and lower latency for video, which is the current mainstream standard and the sort of thing that mostly matters because you stop noticing it. RCA quotes up to 6 hours of continuous play per charge and 20 hours total from the case, and the case shows a digital LED percentage readout — small detail, but a genuinely useful one, because guessing whether you have 40% or 10% before a gym session is annoying.
Controls are touch plus a "Smart Button," covering play/pause, calls, volume and Siri or Google Assistant, and there are built-in mics for hands-free calls. The "Ultra Bass" tuning is a bass-forward profile rather than a neutral one — fine for pop, hip-hop and gym music, less ideal if you mainly listen to acoustic or classical and want accuracy. The open-ear set is designed to give a wide soundstage, which is a pleasant side effect of not sealing your ear.
Who should buy it: anyone whose week includes both sweaty outdoor workouts and indoor calls, people who dislike the pressure of in-ear tips for long stretches, and anyone who'd rather own one case than two pairs of earbuds. Who should skip it: if you need active noise cancellation for flights or open-plan offices, this isn't the tool — the spec sheet lists noise control as "None." And if you want a single dedicated earbud you never think about, the two-set concept adds a decision you may not want.
The NE70 is a different animal. It's positioned as an AI translation earbud, and the design choices all follow from that. The headline feature is a 1.3-inch full-color LCD touch screen built into the charging case, which lets you pick languages, change translation modes and check battery without touching your phone. Anyone who has tried to manage a translation app with a phone in one hand and a stranger waiting in front of you understands why that matters.
Language support is the core spec: 165 languages, with 8 major languages — English, Spanish, French, Japanese, Chinese and others — available as free offline packs you download once. That's the difference between a travel tool and a toy. On a plane, in a village with no signal, or in a country where data is expensive, offline packs keep working. Rulbovs quotes under one second of translation latency at normal speaking pace in close-proximity conversation, with dual-mic beamforming and environmental noise cancellation to keep your voice clear in airports and restaurants. Treat "<1 second" as the manufacturer's claim rather than a lab result I verified — but it's the right thing to be measuring.
There are 9 translation modes, covering face-to-face conversation, group settings via an earbud-and-phone setup, machine-assisted translation for complex sentences, image-based text translation for menus and signs, and one-way interpretation. Battery is quoted at 6 hours of continuous translation in the worst case, 8 hours of music at 50% volume, 4 full recharges from the case for 60+ hours total, and a 1.5-hour USB-C charge for the case. The average battery life field lists 4.5 hours, which reflects mixed real-world use.
Who should buy it: travelers, cross-border workers, people with family or colleagues who speak another language, and anyone who has ever passed a phone back and forth across a table. Who should skip it: if you want earbuds purely for music and podcasts, you're paying for translation hardware and app dependency you won't use. It's also worth noting the sheet lists no warranty — a real consideration for a device this specialized. And the control method is app plus touch, so a phone is part of the workflow even with the screen on the case.
• Best for exercise and outdoor training → RCA EarSwitch 4in1. The open-ear hooks are designed not to fall out and keep you aware of traffic.
• Best for travel and language barriers → Rulbovs NE70. 165 languages with 8 offline packs is the single biggest functional gap between these two.
• Best for battery endurance → Rulbovs NE70 on total capacity (60+ hours with the case), while RCA EarSwitch 4in1 is the simpler pick at 20 hours total if you don't want to think about recharging often.
• Best for calls at a desk → RCA EarSwitch 4in1. The in-ear pair plus built-in mics and voice assistant access is a more conventional calling setup.
• Best for controlling things without your phone → Rulbovs NE70. The case's LCD touch screen is the standout convenience here.
• Best for low-latency video and current Bluetooth → RCA EarSwitch 4in1. Bluetooth 5.4 with a stated 33-foot range.
• Best for one-device simplicity → RCA EarSwitch 4in1. Two earbud styles, one case, one pairing routine.
• Best for group and multi-person conversations → Rulbovs NE70. Its mode list explicitly covers group settings and one-way interpretation.
• Best for noise isolation → neither, strictly speaking. RCA lists no noise control; the NE70's cancellation is aimed at cleaning up mic input for translation, not sealing you off from the world.
In my opinion, most people searching "tws earbuds" want earbuds for music, calls and workouts — and for that person, I'd buy the RCA EarSwitch 4in1. Two earbud shapes in one case solves a real everyday problem, Bluetooth 5.4 is current, and the 20-hour total with a percentage readout on the case is easy to live with. I'd only steer you to the Rulbovs NE70 if translation is the actual job. If you regularly talk to people who don't share your language, the NE70's offline language packs and on-case screen are worth more than any audio spec on this page — and no ordinary pair of earbuds replaces them. Check the current price on Amazon before deciding, since that's the one variable that can tip the call.
how to tws earbuds
TWS stands for "true wireless stereo" — two earbuds with no wire between them, each pairing independently over Bluetooth. Both the RCA EarSwitch 4in1 and the Rulbovs NE70 are TWS designs that ship with a charging case, which also acts as the pairing and storage hub.
how to pair tws earbuds
Take both earbuds out of the case and they should enter pairing mode; then select them in your phone's Bluetooth menu. The RCA EarSwitch 4in1 uses Bluetooth 5.4 with a stated range up to 33 feet, and the Rulbovs NE70 pairs over Bluetooth as well, with translation features handled through its companion app.
how to connect tws earbuds
Connecting is the same step as pairing the first time — after that, most TWS earbuds reconnect automatically when you open the case and take them out, as long as Bluetooth is on. If a bud doesn't reconnect, put both back in the case, close it, then reopen and try again.
how to reset tws earbuds
A reset usually means clearing the saved pairing so the earbuds behave like new: remove the old entry from your phone's Bluetooth list, then place both earbuds in the case and follow the brand's reset steps. Since reset procedures differ between the RCA EarSwitch 4in1 and the Rulbovs NE70, check each product's documentation for the exact button or touch sequence.
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