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 design, excellent chip, clear reception blind spot, so that the systems receiving signal is stable.5. Frequency response range: 20-20kHz6. Transmission distance: 30m7. Dynamic range: greater than 105dB8. Charging interface: Type-CSpecification: Package Weight One Package Weight 0.15kgs / 0.34lb One Package Size 16cm * 12cm * 6cm / 6.3inch * 4.72inch * 2.36inch Qty per Carton 80 Carton Weight 13.00kgs / 28.66lb Carton Size 58cm * 44cm * 27cm / 22.83inch * 17.32inch * 10.63inch Loading Container 20GP: 387 cartons * 80 pcs = 30960 pcs 40HQ: 898 cartons * 80 pcs = 71840 pcs