Features: UHF Wireless System: The system includes lavalier microphone with body-pack and one receiver featuring UHF wireless transmission stable connection and low distortion ensure vocal sound transmission. Clip-on Lavalier Microphone: The wireless lavalier style microphone can be easily clipped on your and cloth very convenient to install battery powered for more portable application. 6.35mm Plug Receiver: The receiver with 6.35mm plug can be applicable for speaker audio mixer and DVD player 3.5mm audio adapter is for camera connection. Battery & Adapter Powered: Lavalier microphone is powered by 2pcs AA batteries easy to change on your own when the battery runs out. The receiver is powered with 1pc 18650 battery.(Batteries Not Included) Wide Application: The headset microphone system has can be widely applicable for video recording broadcast interview online teaching and more occasions with 6.35mm plug and 3.5mm adapter. Specifications: Model: AD-116 Color: Black Main Material: Frequency : 630-690MHz Frequency Response: 50Hz-15KHz Signal/Noise Ratio: >95dB Transmission Distance: ≥30m(open area) Working Distance: 30-50 meters Power Supply: 2 * 1.5V AA batteries(Not included) Receiver Power Supply: 1 * 18650 battery(Not included) Package Size: 30 * 14 * 7cm / 11.81 * 5.51 * 2.76in Package Weight: 400g / 14.11oz Packing List: 1 * Body-pack 1 *Lavalier Microphone 1 * Receiver 1 * USB Cable 1 * User Manual