Features: * Microphone and Rechargeable Receiver: Both the microphone and earpiece are rechargeable, no alkaline battery consumption, no need to connect to a power source, and can be carried anywhere without a cushion. * Automatic connection: The microphone and receiver can be quickly and automatically connected within a distance of 80m, without manual settings, and it is very convenient to use. * Free FM: With selectable UHF frequency, it is not easy to be interfered by electrical appliances and provides stable signal transmission, and allows multiple devices to work together without interference. * Easy to carry: Both the microphone and earpiece are made of metal, which is more sturdy and durable. Also because of its small size, it is easy to carry, you can put it in your pocket and take it with you. * Wide range of application: suitable for home, recording, interview, outdoor performance, concert, exhibition, meeting, conference, church, etc. * Transmitter Auto Sync: This device has an auto sync feature, so you may have difficulty using multiple devices of this model at the same time. Specification: Name: Headset Wireless Microphone Material: all metal Frequency range: 500MHz- 930MHz Debug mode, Dqpfsk Frequency response: 30Hz-18KHz ± 3DB Preset frequency points: 25 (auto pairing) SNR: 96DB Use distance: 30-80M Battery specification: built-in lithium battery Size: 65*52*16mm Receiver size: 65*31*20mm Colour: Black Packing included: 1 * Receiver 1 * Transmitter 1 * Headset Microphone 1 * Lapel Microphone 1 * USB charging cable 1 * 6.35mm to 3.5mm adapter 1 * User Manual