1. 2.4G wireless transmission frequency band. 2. One-click switch between stereo and mono of the transmitter Meet the needs of different devices/occasions. 3. Both the transmitter and the receiver are set with 6 channels. As long as they are set on the same channel, they can be connected and used. 4. Supports 6 receivers to be connected to the same transmitter. 5. The transmitters (3 units) and Receivers (3 units) can be converted or combined with each other. Wireless band: 2.4GHz Effective distance: less than equal 80 ft outdoors / less than equal 40 ft through the wall Delay:less than equal 8ms Lithium battery: 500mAh SNR: -98dB Dynamic range: Greater than 105dB Frequency response: 20-20kHz,+1dB/-3dB Usage Method: 1. Connect the Transmitter to the sound of the mobile phone/sound card/reverberator with an audio cable Output device. 2. Sound mode: According to line input and instrument selection. 2.1: Mono(M): Guitar, bass and other mono equipment.(Fit for the stag) 2.2: Stereo(S): Mobile phones, sound cards and other stereo devices.(Suitable for listening to music) Color:White Material:plastic Package Contents: 1 * Transmitter 1 * Receiver 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.