Features: ●1200mAh battery for extra long usage time: Adapter (with 1 rechargeable 18650 battery), microphone (with 2 dry batteries). The microphone display shows the battery level and signal strength in real time. The microphone and receiver are professionally drop-tested for high impact resistance, lighter weight, and higher abrasion resistance. ●Signal stability: The high-sensitivity professional dynamic microphone extends the working range to 30m, which solves the problem of tangled wires. UHF wireless microphone with built-in cardioid pickup pattern provides a clearer signal and better sound quality, reducing the chance of interference and dropped calls. ●Plug and Play: Just plug the receiver into the MIC jack, the receiver will automatically sync its frequency with the microphone, batteries, adapter plugs/cables, and other accessories are included in the package and ready to use when you receive it. ●Compatible with a wide variety of devices: The microphone is designed to work with devices that have a 6.35mm (1/4 ) or 3.5mm (1/8 ) MIC input. Suitable for karaoke machines, mixers, jukeboxes, audio amplifiers, PA systems, powered speakers, voice amplifiers, truck speaker systems Specifications: ●Connection range: 30m. ●Battery capacity: 1200mAh ●Working hours: 8 hours ●Charging time: 3 hours ●Quantity:1x Rechargeable Battery & 2 Dry Battery ●Frequency response:30Hz-20KHz ●Operating Temperature:-10C-55C How to Use: 1. Put batteries in the receiver and microphones. 2. Plug the receiver into the MIC input of your audio device. 3. Turn on the microphones and the receiver. Warm Tips Before Use: ●Charge the receiver over 3 hours before you begin your first use. ●Make sure the microphones and receiver have enough power before using. ●If fail to connect, please Turn off the microphones and receiver, then turn them on again