1. Lossless professional sound quality, ensuring high-quality audio transmission.2. Adopting 2.4GHz wireless transmission frequency band, supporting24bit/48KHz sampling rate, the sound quality is clearer.3. Up to 30 meters of effective transmission distance, easily the constraints of cables.4. Support one transmitter to connect multiple receivers for transmission at the same time.5. The transmitter has a battery life of up to 24 hours, and the receiver has a battery life of up to 6 hours, which meets the needs of long-term use.Provides four working modes: left channel,right channel, stereo and mute, to meet the needs of different devices.The receiver can adjust the volume and mute,and the transmitter supports one-button mute function.-12 2.4G Wireless Earphone System Transmission Stereo Mono Recorder Rechargeable Transmitter ReceiverSampling rate: 24bit/48KHz lossless digital transmission sound qualityWireless frequency band: 2.4GHzEffective distance: 30 metres outdoor transmission distancePower requirements: Built-in lithium batteries can be used via USBTypeCFor charging, it is recommended to use a 5V1A charger.Frequency response: 20~20K Hz,+1dB/-3dBBattery model specification TX/RX: transmitter 803060, receiver 402030Battery capacity TX/RX: 1800mAh/200mAhBattery nominal voltage: 3.766%Launcher fuselage size (mm): 95.04(L) X 39.7(W) X 38.12(H)mmReceiver body size (mm): 31.1(L) X 41.5(W)mmSingle fuselage weight: transmitter 75g, receiver 15gColor: BlackMaterial: ABSPackage Contents:1 * Wireless Ear Return Transmitter1 * Wireless Ear Return Receiver1 * Charging compartmentOnly 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.