XTUGA J02 2.4G Stereo Wireless In-Ear Mini Monitor System with Transmitter & Receiver(Black)1. 2. 4GHz wireless in ear monitoring system, can build a personal or team monitoring system. Wireless signal transmission, low noise, low latency. 2. 6 channels play simultaneously without interference, delay less than 12ms, and provide clear and delicate audio at any volume. 3. Transmitter and receiver with rechargeable lithium battery, battery life up to 6 8 hours, to ensure every performance has an excellent performance. 4. Using advanced circuit