Detailedú¦ 1. SMD electronic hardware,SMT technologyical maintain high quality. 2. Corrar clip transmitter,high sensitivity,prevent howling,clear timbre. 3. Quartz surge circuitry,steady frequency without disturbance. 4. 65 group VHF 180-265MHz.no disturbance in frequency,have large scope for selection. 5. Two kind of power to choose:built-in rechargeable battery,external 12V DC. 6. When use the DC sudden power off,embedded storage battery auto-work. 7. Wire and wireless microphone loadspeaker. 8. With digital reverberation. 9. Collar clip microphone and handhoid microphone for your choice. DVD function.