1. Support one-touch pairing, saving time for pairing multiple transmitters one by one 2. One-way one-to-many explanation 3. 2.4G universal frequency band 4. Long transmission distance, 100-150 meters barrier-free distance 5. OLED high-definition wide-angle display Wireless interpreters mainly transmit voice content through the device. One person can interpret and multiple people can listen in the same channel as the receiver. The 2.4G frequency band used has strong anti-interference ability, high confidentiality, and multiple channels. Basic information such as channel number and signal are displayed on the OLED screen. The combination of buttons and knobs makes the product easy to operate and beautiful. Operating temperature:55-125 Talk distance:100-150m barrier-free distance Number of channels:35 Frequency:2.4GHz Battery capacity:1200mAh Basic use time:about 11 hours Charging interface:DC5V 1A (Type-C) Specifications:B:Receiver Colour:Black Material:Plastic Package Contents: 1 * Receiver 1 * Earphone 1 * Lanyard 1 * Type-c charging cable 1 * English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.