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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want longer total playtime with a low-latency, bass-forward everyday pair, choose Bloody M70; if you need the smallest, lightest true wireless buds that disappear in your ears and carry on a wrist strap, choose ADVANCED SOUND GROUP 500. Both are cheap TWS earbuds, but they solve very different problems — one leans on battery and sound tuning, the other leans on size and fit.
• Bloody M70 — biggest strength: Bluetooth 5.0 with up to 10m range, 22H total playtime, a 6mm M.O.C.I. hybrid diaphragm for deep bass, and IPX4 splash resistance you can wear through a workout.
• Bloody M70 — biggest trade-off: Each earbud is rated for only about 4 hours per charge, so the 22H figure depends on topping up in the case; the case itself is on the larger side at 55g.
• ADVANCED SOUND GROUP 500 — biggest strength: It is built around miniaturization — a charging case barely bigger than a quarter, rounded edges that remove pressure points, and a built-in wrist strap for everyday carry.
• ADVANCED SOUND GROUP 500 — biggest trade-off: No water-resistance rating listed and no low-latency mode, so it is not the obvious pick for sweaty workouts or gaming.
• Who Bloody M70 is for: Anyone who wants a bass-heavy, low-latency set for commuting, calls and light exercise.
• Who ADVANCED SOUND GROUP 500 is for: Anyone with small ears, or who wants the most pocketable, minimal earbuds possible.
The Bloody M70 is the pair I would hand to someone who treats earbuds as a daily tool rather than a fashion object. It uses Bluetooth 5.0 with a stated range of up to 10 meters, and pairing is a one-step affair — you pick "Bloody M70" from your phone's Bluetooth list and you are done. Both earbuds receive the signal synchronously, so there is no awkward "primary and secondary" setup where one bud depends on the other. That matters more than it sounds when you only want to pull out one earbud.
The audio side is where Bloody leans hardest. A 6mm M.O.C.I. hybrid diaphragm driver, a dynamic driver type, 32-ohm impedance and a 20Hz–20kHz frequency range point to a warm, bass-forward tuning rather than a flat studio sound. There is no active noise cancellation here — the noise control is listed as sound isolation, which means the seal from the included S/M/L sleeves does the work. Touch controls handle media playback, and the low-latency mode is aimed at people watching video or gaming on a phone, where audio lag is the thing that ruins the experience.
Buy it if you want deep bass, low latency, splash resistance and a long total playtime number, and you do not mind topping the buds up in the case. Skip it if your priority is the smallest possible footprint or the most comfortable fit for very small ears.
ADVANCED SOUND GROUP 500: Who It's For
The ADVANCED SOUND GROUP 500 takes the opposite approach: instead of piling on features, it shrinks everything. The pitch is that the charging case is barely bigger than a quarter, and the earbuds themselves are rounded-tip, minimalist, universal-fit pieces designed to remove pressure points inside your ear. If you have ever given up on earbuds because they ached after an hour, that design intent is the whole reason to look at this pair.
It also runs a newer Bluetooth version — 5.2 versus 5.0 — with a stated range of about 40ft (12.19 meters) when there is no physical barrier between the buds and the source. In practice that means you can leave your phone on a desk and walk around a room without the signal dropping. The driver is a 6mm custom-tuned full-range dynamic unit with a 20Hz–20kHz range, described as loud and powerful with deep, rumbling bass. That is a similar driver size to the Bloody M70, so do not expect a night-and-day difference in raw output; the tuning philosophy is simply "loud and full" rather than "neutral."
Battery is rated at about 5 hours per earbud with a 1-hour charge time — slightly longer per session than the Bloody M70, but there is no total-with-case figure given, so I would not assume a bigger overall number. There is also no IP rating listed, no low-latency mode, and the enclosure is plastic. Touch controls are present, and the built-in wrist strap is a genuinely clever touch for the everyday-carry crowd: clip it to a bag loop or your keys instead of hunting through a pocket.
Buy it if small size, a pressure-free fit and portability are your top priorities, and you mostly listen in dry, everyday situations. Skip it if you need water resistance, gaming-grade latency, or a documented total playtime for long trips.
• Best for total battery life → Bloody M70. Its 22H total playtime with the case is the clearer long-haul number; the ADV. 500 lists 5 hours per bud with no case total.
• Best for the smallest possible size → ADVANCED SOUND GROUP 500. A case barely bigger than a quarter is the entire point of the design.
• Best for small or sensitive ears → ADVANCED SOUND GROUP 500. Rounded edges and a universal-fit shape are explicitly built to remove pressure points.
• Best for workouts and wet weather → Bloody M70. IPX4 is the only splash-resistance rating between the two.
• Best for gaming and video → Bloody M70. Low latency is listed as a feature; the ADV. 500 does not mention it.
• Best for range and a newer Bluetooth version → ADVANCED SOUND GROUP 500. BT 5.2 with a stated ~40ft range beats BT 5.0 with 10m.
• Best for bass-focused listening → Either, with a caveat. Both use a 6mm dynamic driver; the Bloody M70 adds a hybrid diaphragm, the ADV. 500 is custom-tuned full-range. In my opinion the Bloody tuning is the safer bet for bass lovers.
• Best for carrying loose in a pocket or bag → ADVANCED SOUND GROUP 500. The wrist strap and tiny case make it the easier everyday carry.
If I were buying one of these for myself, I would go with the Bloody M70. The combination of IPX4 splash resistance, a low-latency mode, Bluetooth 5.0 with 10m range and a 22H total playtime figure covers the widest range of real days — commute, calls, gym, video. The 4-hour-per-bud rating is the trade-off I would accept, because the case closes that gap. I would only pick the ADVANCED SOUND GROUP 500 instead if tiny size and a pressure-free fit mattered more to me than water resistance and latency, because that is genuinely the one thing it does better. Check the current price on Amazon before you commit, since the value calculation is the whole game with cheap TWS earbuds.
what is tws earbuds
TWS stands for "true wireless stereo." It means the two earbuds are completely independent — no wire between them and no wire to your phone. Both the Bloody M70 and the ADVANCED SOUND GROUP 500 are TWS earbuds that connect over Bluetooth.
what is tws earbuds means
It means the left and right earbuds each have their own Bluetooth connection and their own battery, and they sync with each other to play stereo audio. The Bloody M70, for example, uses binaural synchronous transmission so both buds work independently rather than one relaying to the other.
how much is tws earbuds
It varies a lot by brand and features, and neither of these pages lists a price. The honest answer is that both the Bloody M70 and the ADV. 500 sit in the budget tier, so check the current price on Amazon — the button on this page will show it.
how to tws earbuds
Take both buds out of the charging case, open your phone's Bluetooth settings, and select the model name — "Bloody M70" for the Bloody pair. Both are one-step, touch-controlled designs, and both include multiple ear tip sizes, so start by fitting the sleeve that seals best.
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