Features: Wireless Karaoke Microphone System: UHF Wireless Microphone Produces High-Quality Clear Sound Wireless Karaoke Microphone System: UHF Wireless Microphone Produces High-Quality Clear Sound Without Distortion. The professional dynamic microphone set comes with 3 built-in, replaceable rechargeable batteries. 1200mAh battery extra long life use: 3 rechargeable 18650 replaceable batteries, no need to buy batteries, 10 hours working with full charge within 3 hours. Features microphone resistance the battery level and microphone signal strength in real time. The microphone and receiver are professionally tested for high impact resistance, lighter weight, and greater abrasion resistance. The high-sensitivity professional dynamic microphone extends signal stability: The high-sensitivity professional dynamic microphone extends the working range to 160 feet (50 m), which solves the problem of tangled wires. The built-in UHF wireless microphone with a 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, and the receiver will automatically sync your frequency with the microphone, Batteries, adapter plugs/cables, and other accessories are included in the package and ready to use when You receive them. Microphone MIC input 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. Box-hunting speaker systems, suitable for karaoke machines, mixers, jukeboxes, audio amplifiers, PA systems, powered speakers, voice amplifiers, truck speaker systems

Specification: Connection range: 160 feet (50m). 1200 mAh lithium battery capacity: 1200 mAh lithium battery Working hours: 8 working hours Charging time: 3 hours Quantity:3× Rechargeable & Replaceable battery for microphones and receiver Frequency response: 30Hz-20KHz Operating temperature: -10C-55C Method of Use: 1. Put rechargeable batteries into the receiver and microphones. Put rechargeable batteries into the receiver and microphones. 2. Connect the receiver to the MIC input of your audio device. Connect the receiver to the MIC input of your audio device. 3. Turn on the microphones and the receiver. Hot tips before use: Charge the microphones and receiver more than 3 hours before starting the first use because their batteries were not fully charged when they were packed. Make sure the microphones and receivers have enough power before use. If it fails to connect, turn off the microphones and receiver, and turn them on again Included in the Package: UHF Wireless Microphone Receiver Rechargeable and replaceable batteries Non-slip rings Adapter from 3.5 mm to 3.5 mm Micro cover User manual