Perfect for parties, family singing, making you feel at the center of a mini KTV club Designed with built-in speaker, 360 degrees stereo sound, enjoy perfect clear sound This microphone adopts Bluetooth connection technology, compatible with all smartphones The microphone has built-in rechargeable battery, with long use and standby time Fashional appearance, with good holding feeling Specification: Battery capacity: 1500mAh Input voltage: 5V/1A Transmission distance: 10m Frequency response: 20HZ-20KHZ Signal-to-noise ratio: ≥90dB Working voltage: 3.7V Distortion: 1% Speaker: 5W Charging interface: Type-C Talk time: 3.5h Standby time: ≥90 days Charging time: 2-3.5H Size: 222*77*82mm Weight: 380g Package included: 1 x Wireless Microphone 1 x USB Charging Cable 1 x English User Manual