1. Note: this is only a wireless transmitter, it must be matched with the receiver to build a wireless tour guide system
2. Frequency range: 195-216MHz
3. Channels: 49 channels
4. Frequency response: 50Hz-18000Hz
5. Operating voltage: DC 3.7V
6. Transmit output power: 18dBm
7. Audio input: 3.5mm line/microphone input
8. Signal-to-noise ratio (SNR): 80dB (typical)
9. Mirror image rejection ratio: greater than 90dB
10. Distortion: less than 0.3 percent
11. Effective working area: about 100m (open)
12. Battery capacity: 4200mAh
13. Operating time: about 20h
14. Size: about 20.5 x 6 x 2cm
15. Weight: about 140g

Features:
1. Portable design, lightweight and compact
2. PLL synthesis design, high frequency stability
3. 49 channels, allowing 49 groups to operate simultaneously at the same location
4. Built-in rechargeable lithium battery, to ensure that can be used one day
5. LCD display, adjustable volume, power display, easy to operate
6. One transmitter can work together with any number of receivers
7. Transmitter supports external audio input, such as MP3, smart phones
8. About 120m(393ft) communication distance
9. ID setting in two ways: wireless and manual, if you need to set ID for many receivers, wireless ID setting method is faster.
10. Support transmitter one key to turn off the same frequency receiver, transmitter one key to mute, transmitter one key to frequency pairing
11. Application: tour guide, wireless conference, wireless teaching, simultaneous interpretation, corporate hospitality, factory visits, etc.

Packing list:
- Wireless transmitter x 1
- Lavalier microphone x 1
- USB charging cable x 1
- Lanyard x 1
- Instruction manual x 1