Main Features ◆ The optional A/B dual audio group ◆50 channels can be used for multi-position complex occasions ◆The transmission distance up to 60 meters (70 meters in an open and non-interfering environment) ◆ Receiver end has monitoring function ◆Automatic ID matching function ◆Volume 10 adjustable ◆Mono/Stereo Switch ◆Two input modes, MIC and LINE IN, are available ◆Transmitter screen function display ◆Built-in lithium battery ◆Ultra-low power consumption, super standby time ◆Metal shell, superior shielding performance Notes ◆Do not use this equipment in rain or damp environment . Keep away from fire or high temperature environment to avoid the danger ◆At the time of starting up the automatic code checking, the code time receiver and transmitter remain at 1M distance . Otherwise, the code may not succeed ◆To avoid the current interference in the course of operation, such as voice channel switching , dial insertion connector and so on ◆Antenna affects receiving distance . Please protect it and avoid man-made damage ◆When the device is connected to the phone, it must purchase the TRS TRRS audio conversion line separately (part of the mobile phone's original ecosystem recordingsystem is temporarily unsupported, and the third party software is recommended). ◆If you don't use the device fora long time, please remove the battery and store it inthe dry environment .◆Charging time of the device is about 3 hours, and the standby time of the transmitter is about 8 hours, and the standby time of the receiver is about 5 hours. ◆In the process of using, when the power is insufficient, the indicator light will flicker. The indicator light can be used for about 20 minutes after flashing. In order not to affect the operation, please use the standby power in advance.