Product Model: XXD-U12U Material: Plastic + metal Mic Type: Condenser Wearing Way: Headset wearing Display Screen: LCD Digital display Color: Black Power Supply: Built-in rechargeable 500mAh 3.7V Battery Receiving Sensitivity: -94dBm Transmitting Frequency: 689MHz-718MHz Frequency Response: 20Hz-20kHz Power: Receiver: 95mA; Transmitter: 110mA Effective Distance: 40-50m Transmitting Channels: 30 Features: UHF Wireless technology, anti-interference, long distance, high definition, and USB flash disk supported Compatibility: All audio equipments with Mic ports Net Weight: About 36g Gross Weight: About 87g Charging one time and it can be working for up to 12 hours. 200 FM transmitting channels to , no interference with each other, multiple functions and wide compatibility. HD digital display screen, light weight and portable with volume up function. Ergonomic design makes it comfortable to wear. It is widely applied in teaching, guiding, promotion, lecture, meeting, karaoke, singing, home using, KTV and computer. package list 1 X Wireless Microphone 1 X Cable Line 1 X USB Receiver 1 X 3.5mm Audio Cable 1 X 6.35mm Mic Plug Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.