•Wireless handheld microphone system (1 receiver+2 microphones) for karaoke,parties,DJs,business meetings,lectures or other outdoor and indoor activities •High receiving sensitivity and excellent sound quality make speaking or singing more smooth and clear •The mini receiver with built-in lithium-ion battery supports up to 6 hours of working time •The microphone is powered by 2 AA batteries and can be used continuously for up to 10 hours •The wireless transmission distance is up to 50 meters; the system is designed with 25 optional frequencies. Press the "high/low" button to change the frequency,and the receiver will automatically pair with the transmitter frequency •It comes with a 6.35mm to 3.5mm plug adapter,two microphone windproof foam caps and two rubber rings for comfortable use Specification: •System-Modulation: Digital FM •Carrier frequency: UHF •Preset frequency: 25 (auto pairing) •Frequency response: 75Hz-18kHz±3dB maximum •Variation range: ±50kHz (with level limit) •T.H.D.: 98db •Working range: up to 50m •Radio frequency carrier stability: ±0.005% (-10℃-50℃) •Wireless receiver Power supply: built-in lithium ion battery (500mAh) •Battery life: up to 6 hours •Charging time: about 1 hour (5V/1A) •Product size: 9.4 * 3.1 * 2cm/3.7 * 1.2 * 0.8in •Product weight: 36g/1.3oz •Handheld microphone Input sound: dynamic •Carrier frequency power: 30mw •Power supply: 2 AA batteries (not included) •Working time: up to 10 hours •Product size: 25 * 3.8 cm/9.8 * 1.5 inches •Product weight: 255 grams/9 ounces Package included: •2 x Wireless Handheld Microphones •1 x Receiver •1 x USB Cable •1 x 6.35mm to 3.5mm Adapter •2 x Foam Microphone Cover •1 x Rubber Ring •1 x English User Manual