POWERFUL VOICE AMPLIFIER - The voice amplifier adopts UHF transmission, 20W output powerful, clear, low feedback and no noise & distortion original sound. More importantly is automatic connection function of microphone and amplifier has been upgraded, you never have to manually reconnect again. SUPERB BATTERY LIFE - Built in newest upgraded rechargeable batteries, Mic fully charge is only 1 hours, working time upgraded to 6 hoursVoice amp fully charge is only 3 hours, working time upgraded to 15 hoursBesides, the microphone and speaker come with a power save mode. Greener and more durable BLUETOOTH 5.0 WIRELESS VOICE AMPLIFIER - Built with the newest Bluetooth 5.0 chip with EDR technology, this Bluetooth voice amplifier ensures a faster and more stable connection than Bluetooth 4.0, TWS Feature support Pair 2 speakers together for 40 watt stereo sound. WATERPROOF VOICE AMPLIFIER WIRELESS- The Portable PA System is rugged enough for outdoor/indoor use and rigorously tested to