The K8 series audio guide system is built for government agencies, corporate offices, and organizations that host visitor tours, factory inspections, and group briefings. It uses a simple transmitter-and-receiver setup: the presenter speaks into a microphone connected to the transmitter, and visitors listen through ear-mounted receivers. The system is designed for situations where one person needs to address a group in environments where normal speech would be drowned out by distance or noise.
Key features of the K8 system
The device consists of two main components: a transmitter and a receiver.
- The receiver and headset are integrated into a single Bluetooth unit. The entire device weighs just 20 grams and fits comfortably on the ear.
- The transmitter supports two simultaneous speakers and can also play pre-recorded commentary.
- Digital transmission avoids interference from other devices, so multiple groups can operate in the same area without crosstalk.
- It uses GFSK (Gaussian Frequency Shift Keying) modulation, which gives the system strong resistance to signal disruption.
- The compact, integrated design gives the system a professional appearance suited to formal settings.
Common applications
Tour guiding
When a guide leads a group through crowded or noisy surroundings, heavy and complicated equipment slows everyone down. The K8 is light enough that tourists can focus on the tour while the guide can move freely and deliver a clear presentation.
Simultaneous interpretation
The system works as a straightforward interpretation tool for international conferences, religious events, and charity gatherings. It avoids the complexity of older interpretation setups and can be deployed quickly.
Factory and site inspections
Production floors, docks, and manufacturing plants are inherently noisy. With the K8, a guide does not need to split a large group into smaller ones or shout over machinery noise. Visitors hear every word through their receivers, and the use of dedicated equipment reinforces a professional company image.
Technical specifications
K8 Transmitter
| Working frequency | 860 MHz – 870 MHz (other frequencies customizable) |
| Channel quantity | 100 channels |
| Modulation mode | GFSK |
| Working distance | 180 meters |
| Battery capacity | 130 mAh |
| Dimensions | 105 x 70 x 20 mm (including antenna) |
K8 Receiver
| Working frequency | 860 MHz – 870 MHz |
| Weight | 18 g |
| Modulation | Four-level cyclic |
| Working current | Standby: 35 mA / Working: 45 mA |
| Resolution | 90 dB |
| Frequency response | 20 Hz – 22 kHz |
| Dimensions | 69 x 26 x 12 mm |
Accessories and packaging
The K8 system works with a range of accessories including a microphone, a 10-unit charger, and a charging storage box. Each unit ships in standard export packaging, and international delivery is available through DHL, FedEx, UPS, and EMS with a typical transit time of 3 to 7 business days.
Service and warranty
Free logo printing is available on orders above 300 units. All transmitters and receivers carry a 2-year warranty. A proportion of spare parts is included with every formal order.
Frequently asked questions
How many receivers can connect to one transmitter?
There is no fixed limit on the number of connected receivers.
What frequency range does the system use?
The standard range is 860–870 MHz. Other frequencies can be configured on request.
What is the effective transmission range?
Up to 200 meters in open conditions.
How many channels are available?
100 channels, which allows multiple groups to operate simultaneously in the same area without interference.
How many groups can use the system in the same location?
That depends on how many channels are in use. Each group needs its own channel, so the more channels the system supports, the more groups can work at the same time.
What does the warranty cover?
24 months of coverage on all transmitters and receivers.
What is the production lead time?
3 to 5 working days for orders under 300 units. 5 to 8 working days for orders under 1,000 units.
How long does a full charge last?
The transmitter runs for up to 10 hours. The receiver runs for up to 12 hours.
How long does it take to charge?
Approximately 2 to 3 hours for a full charge.