Wireless System: UHF wireless microphone produces high quality clear sound without distortion. 1200mAh battery for extra long usage time: Rechargeable replaceable batteries, 10 hours of work with a full charge within 3 hours. 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 160ft (50m), 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 of devices: The microphone is designed to work with devices that have a 6.35mm (1/4inch) or 3.5mm (1/8inch) MIC input. Suitable for karaoke machines, mixers, jukeboxes, audio amplifiers, PA systems, powered speakers, voice amplifiers, truck speaker systems Connection range: 160feet (50m). battery capacity: 1200 mAh Lithium battery working hours: 8 hours Charging time: 3 hours Frequency response:30Hz-20KHz Operating Temperature:-10-55 How to Use: 1. Put rechargeable 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: 1. Charge the microphones and receiver over 3 hours before you begin your first use because their batteries were not full when they were packed. 2. Make sure the microphones and receiver have enough power before using. 3. If fail connectly,please Turn off the microphones and receiver,then turn on again Note:Due to different product batches, the appearance may be different, which does not affect use. Type:1 to 2 Colour:As Shown Material:Plastic+Metal Package Contents: 1 * Wireless Microphone Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.