Anti-Interference Wireless Tour Guide Audio System
Channels: 999 (CH:001–CH:999)
Range: 300m
Battery Life: 20H (transmitter)
Charging: USB-C, 0.8A
Hefei Humantek Co., Ltd. is one of the leading manufacturers and suppliers of anti-interference wireless tour guide audio system in China. With a professional production team, we are able to meet the needs of the majority of our customers. Welcome to buy bulk high quality anti-interference wireless tour guide audio system from our factory.
The B7-2 pairs a pocket transmitter with a lightweight ear-hook receiver, holding a clean signal across 999 channels even in crowded galleries, factory floors, and outdoor groups.
Products Features
Museum floors, factory tours, and open-air routes all share the same problem: too many transmitters, too little clean bandwidth. The B7-2 addresses this at the channel level, not just at the volume knob.
999-Channel Frequency Range
Operating on 2.4GHz FHSS across CH:001–CH:999, adjacent tour groups can run side by side on separate channels without bleed-through.
One-Key and Manual Pairing
Guides can pair a full set of receivers to a transmitter in seconds, or set a fixed channel manually for multi-day tours and fixed installations.
300-Meter Transmission Range
A stable range of 50–300m keeps visitors connected across large exhibition halls, plant floors, and outdoor courtyards without repeaters.
All-Day Battery Life
The transmitter's 3000mAh cell runs up to 20 hours with Bluetooth off, covering a full day of back-to-back tours on one charge.
Bluetooth 5.2 Connectivity
Receivers pair over Bluetooth 5.2 for setup and calls, with a working distance of 100–250m independent of the tour channel.
Dual Charging Options
The transmitter charges from its dock or directly by USB-C at 0.8A, reaching a full charge in around four hours either way.
Transmitter Controls at a Glance
3.5mm microphone input accepts a plug-in dual mic for hands-free narration during longer walking routes.
One-key mute toggles instantly, with a long press restoring the mic after a brief pause.
Pairing and channel adjustment run through the same volume keys, switching modes with a single button combination.
LCD status display shows mute state, pairing status, channel number, battery level, and Bluetooth status in one view.
Specifications
The full B7-2 set: transmitter, ear-hook receiver, charging case, and USB-C cable - sized and rated as detailed below.
| B7-2 Transmitter | |
|---|---|
| Working Frequency | 2.4GHz, 999 channels (CH:001–CH:999) |
| Charging Method | Charging dock or USB-C cable, 0.8A, approx. 4 hours full charge |
| Operating Temperature | -20°C to +70°C |
| Microphone | Unidirectional |
| Transmission Range | 50–300m (open area) |
| Standby Time | 20 hours (Bluetooth off) |
| Dimensions | 114.7mm (L) × 55.3mm (W) × 20.8mm (H) |
| Battery | 3000mAh, 3.7V |
| B7-2 Receiver | |
| Dimensions | 50mm (L) × 50mm (W) × 14.5mm (H) |
| Weight | Approx. 12g per earpiece; 85g per full set (two earpieces + charging case) |
| Bluetooth | Bluetooth 5.2, device name "A16" |
| Call Distance | 100–250m |
| Battery Life | 7–20 hours (depending on volume level) |
| Battery | Earpiece: 3.7V, 100mAh · Charging case: 3.7V, 300mAh |
| Charging | Earpiece via case: approx. 2 hours · Case via USB-C: approx. 2 hours |
| Compatible Transmitters | Single mic: B7-2 transmitter · Dual mic: B7-2 transmitter + secondary unit |
Application scenarios
Factory and Plant Tours
Clear narration over ambient machine noise, with a range built for long production lines.
Museums and Galleries
Multiple docent groups moving through connected rooms without overlapping audio.
Outdoor and Heritage Sites
A 300m range keeps groups connected across courtyards, gardens, and open plazas.
Exhibition Halls and Trade Shows
Booth presenters and floor guides stay on separate channels across a busy show floor.
FAQs
Q: How many groups can operate in the same building at once?
A: With 999 selectable channels, a single venue can run many simultaneous tours; the practical limit comes from spacing between groups rather than the channel count itself.
Q: Does the receiver need Bluetooth to function during a tour?
A: No. Tour audio runs on the 2.4GHz channel between transmitter and receiver; Bluetooth is used separately for calls and device setup.
Q: How long does a full set last on one charge?
A: The transmitter runs up to 20 hours with Bluetooth off, and receivers last 7–20 hours depending on volume, both charging fully in about 4 hours.
Q: Can guides switch between live narration and a plug-in microphone?
A: Yes. The 3.5mm input accepts a dual microphone for hands-free use alongside the transmitter's built-in mic.
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