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If you want a self-contained two-way radio system where a wireless earpiece is already paired and ready the moment you switch it on, choose Retevis RB37; if you need one lightweight Bluetooth headset that hops between your phone, laptop and tablet for calls all day, choose Caymuller Headset. These two products both put a microphone on your head, but they solve completely different problems — one is a radio-first tool, the other is a voice-first accessory. Let me break down where each one actually makes sense.
• Retevis RB37 biggest strength: A complete two-way radio kit (two radios, two wireless earpieces) that arrives pre-paired, with a 2000 mAh battery and up to 120 hours of standby for license-free FRS communication.
• Retevis RB37 biggest trade-off: The Bluetooth is locked to its own ecosystem — the radios only work with the matching Retevis RB37 earpiece, and they are not water resistant.
• Caymuller Headset biggest strength: A universal Bluetooth 5.1 headset with a 330° flexible noise-canceling mic, multi-point pairing for two devices at once, and just 0.09 pounds on your head.
• Caymuller Headset biggest trade-off: It has no radio built in — it is only as useful as the phone, laptop or tablet you connect it to.
• Pick Retevis RB37 if you are coordinating a church team, a family camping trip or a small crew and want push-to-talk voice without touching a phone.
• Pick Caymuller Headset if you live on calls — Skype, conference lines, a dispatch desk or the cab of a truck — and want one headset for every device.
The RB37 is a two-pack of portable FRS two-way radios bundled with matching wireless earpieces. The headline convenience is that the radios and earpieces ship already paired, and the earpiece reconnects automatically to the first radio it bonded with. That means no setup ritual at the start of an event — you power on and talk. Retevis rates the Bluetooth link for roughly 10 meters, and the touch PTT button on the earpiece keeps your hands free while you transmit.
On the radio side, the numbers are built for a full day out. Each unit carries a 2000 mAh lithium-ion battery with up to 12 hours of continuous use and up to 120 hours of standby, recharged over Type-C. You get 22 channels with VOX hands-free operation, a built-in flashlight, and a claimed maximum talking range of about 2 miles in open conditions. The RB37 can also talk directly to other Retevis FRS radios on channels 1–5, including the RT21, RT22, RT68 and H-777, as long as channels, frequencies and sub-audio codes match.
There is one catch worth understanding before you buy. Retevis states plainly that the RB37 Bluetooth radio only works with the same-model RB37 headset — you cannot pair it with another brand's Bluetooth headset or a phone headset. If you want to receive audio, you either use the included earpiece or long-press the side button to switch Bluetooth off and use the radio normally. And with a "not water resistant" rating, this is fair-weather gear.
Caymuller Headset: Who It's For
The Caymuller Headset is the opposite philosophy: one headset, every device. It runs Bluetooth 5.1 with multi-point connection, so it can hold two Bluetooth devices simultaneously and switch between them — phone in one pocket, laptop on the desk — with a wireless range of about 33 feet. That is the exact behavior a call-center agent or a truck driver needs when a call arrives while they are away from the desk.
The microphone is the real story here. It is a 330° flexible boom with active noise cancellation, designed to isolate your voice from background noise and to be positioned at the angle that captures you best. Combined with a one-touch mute (press "+" and "−" together) and simple answer/end/volume controls, it is built for people who spend hours on Skype, conference calls or dispatch lines.
Comfort is where the spec sheet gets specific: 0.09 pounds, padded ear cushions, a stretchable headband, and an on-ear hook design that can be worn on either the left or right ear. Battery life is listed at up to 12 hours of continuous talking and 160 hours of standby, with a 2-hour charge over Type-C — and a charging base is included, so the headset has a home on your desk rather than a tangle of cables.
Who should buy it? Anyone whose job or day is voice calls across multiple devices: office workers, remote staff, truckers, call centers, students in online classes. Who should skip it? If your need is group push-to-talk out in the field with no phone signal or Wi-Fi, this headset has nothing to connect to — that is a radio job, not a headset job.
Side-by-Side: Which Should You Choose?
• Best for hands-free group coordination → Retevis RB37. Two radios and two pre-paired earpieces mean your whole team can be talking within minutes.
• Best for battery endurance → Caymuller Headset. Both list 12 hours of active use, but Caymuller pairs that with up to 160 hours of standby versus the RB37's 120 hours.
• Best for a long day of intermittent use → Retevis RB37. The 2000 mAh pack and Type-C charging suit a radio that sits idle between transmissions.
• Best for noisy environments → Caymuller Headset. The active noise-canceling 330° boom mic is purpose-built to isolate your voice.
• Best for working away from a desk → Retevis RB37. No pairing, no phone needed, and a claimed 2-mile range between radios.
• Best for wearing all day → Caymuller Headset. At 0.09 pounds with a stretchable headband and either-ear fit, it is designed for hours of comfort.
• Best for weather and rough outdoor use → neither, strictly speaking. The RB37 is not water resistant, and the Caymuller is an office-style on-ear headset. Treat both as dry-condition gear.
One more thing worth flagging: if you are torn because you want both group radio talk and general Bluetooth calling, you cannot get there with the RB37 alone. Its Bluetooth is deliberately closed to its own earpiece. The Caymuller, meanwhile, cannot transmit on FRS at all. These are complementary, not competing, in a lot of real setups.
If I had to pick one, it comes down to what "business Bluetooth" means in your day. For remote work, call centers, trucking or anyone juggling calls across a phone and a laptop, I would buy the Caymuller Headset — the multi-point Bluetooth 5.1, flexible noise-canceling mic and near-weightless fit make it the more versatile everyday tool. I would only reach for the Retevis RB37 if my actual job is getting a group of people talking to each other hands-free outdoors or across a building, where a radio beats a headset every time. Before you commit, check the current price on Amazon using the button on this page, since that is the one thing that can tip a close call.
FAQ
how to use business wireless headset
how to pair business wireless headset
For the Caymuller, one key powers it on and puts it into pairing mode, after which you select it from your phone or computer's Bluetooth list. The Retevis RB37 earpieces are pre-paired out of the box and reconnect automatically to the first radio they bonded with; if you lose track of which headset goes with which radio, you clear the headset's connection memory and reconnect.
can bluetooth headsets talk to each other
No — Bluetooth headsets like the Caymuller connect to a host device such as a phone or laptop, not directly to one another. If two people need to talk to each other wirelessly, that is a two-way radio job: the Retevis RB37 radios communicate over FRS channels, with each person wearing the matching earpiece.
do these headsets work with any phone or radio
The Caymuller Headset works with most Bluetooth-enabled devices, so it is effectively universal. The Retevis RB37 is the opposite: Retevis states it can only be used with the same-model RB37 headset and cannot pair with other brands' Bluetooth headsets or phone headsets, so plan around that closed pairing.
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See also: Caymuller Headset vs Qecnato Headset: Business Bluetooth, NVAHVA Headset vs Qecnato Headset: Business Bluetooth, Retevis RB37 vs Soothielec Headset