Features: UHF wireless head-wear microphone, 2 wireless microphones and 1 receiver. 160 feet stable wireless voice recording for audio amplifiers, portable sound amplification systems. Long working time, up to 6 hours. High power loudspeaker, such as stage loudspeaker system, media level loudspeaker, cart loudspeaker, etc. Suitable for Stage artist, tour guide, teacher, trainer, etc. Specification: Condition: 100% Brand New Item Type: Wireless Mic Material: ABS Color: as picture shown Audio signal: digital sampling Matching mode: auto play Frequency range: 550.5 MHz-589.5 MHz Frequency response: 50hz-8khz Transmission mode: UHF Power consumption: 0 dB current, less than 75 mA Audio output: mixed output Power supply: built-in 400 mAh polymer battery Working hours: 6 hours Charging time: 2.5 hours 160 feet (50 meters) of steady wireless transmission Package List: 2 x Mic 1 x Receiver 1 x 2 in 1 Charger 1 x 3.5mm/6.5mm Adapter 1 x Manual .