Wireless explainer - transmitter, mainly transmits voice content through the device, and the receiver can realize one person explaining and multiple people on the same channel as the receiver. The 2.4G frequency band used has strong anti-interference , high confidentiality and multiple channels. Basic information such as channel numbers and signals are displayed on the oled screen. With buttons and knobs, the product is easy to operate and beautiful. Support - key pairing, saving the time of pairing multiple transmitters one by one; One-way one-to-many explanation; 2.4G common frequency band; The transmission distance is long, and the -free distance is 100-150 ; OLED high-definition wide-angle display receiver: 1. 2.4G common frequency band; 2. The transmission distance is long, and the -free distance is 100-150 ; 3. OLED high-definition wide-angle display. Working temperature: 55~125 Call distance: 100~150m -free distance Number of channels: 35 Frequency: 2.4GHz Battery capacity: 1000mAh Charging interface: DC5V 1A (Type-C) The wireless interpreter-receiver is mainly used to receive content transmitted by the transmitter. It uses the 2.4G frequency band, which has strong anti-interference , high confidentiality, and multiple channels. There are many scenarios supported, such as tour guide explanation, corporate reception, wireless conference, explanation, wireless teaching and other -scale multi-person scenarios. Colour:White Material:ABS Package Contents: 1 x Transmitter 1 x Type-c charging cable 1 x Receiver 1 x Headphone 1 x Lanyard 1 x Chinese and English 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.