Specification:        Origin: Mainland China        Style: Lavalier Microphone        Use: Live        Transducer: Dynamic Microphone        Set Type: Multi-Microphone Kits        Communication: Wireless        Package: Yes        Polar Patterns: Uni-directional     Colour: Black     Material: ABS+Metal     Size: 43.5 x 25 x 8.5mm/1.7 x 1.0 x 0.3inch     Emitter: 45 x 19 x 16mm/1.8 x 0.7 x 0.6inch     Charging compartment: 85 x 62 x 29mm/3.3 x 2.4 x 1.1inch     Transmission protocol: Bluetooth-compatible 2.4G     Transmission distance: ≥20m     Headphone monitoring: Support     Noise cancellation: Support three levels of noise cancellation     Reverb: Support     Sound delay: ≤25ms     Transmission delay: 15ms     Microphone: -38dB±3dB     Frequency response: 20Hz-20KHz     Signal to noise ratio: ≥70dB     Operating current: 12mA     Shutdown current: 20uA     Endurance: 6H     Rechargeable battery: 300mAh     Input voltage of charging compartment: 5V-20V     Product voltage: 5V 1A              Note:  Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you  Please allow 1-2cm measuring deviation due to manual measurement.                       Packages:      1 x Charging Bin        1 x Receiver     2pcs x Transmitter