Specifications: Microphone Fixed Frequencies: 661MHz, 664MHz, 666MHz, 668MHz (to prevent crosstalk interference, the frequency of each microphone is different) Freg Width: 50MHz Max Deviation: ±25KHz Modulation: UHF Freq Response: 50Hz-15KHz S/N: -72dB Working Temperature: -10C-50C Working Voltage: 3V Working Distance: ≥20m/65.6ft Microphone Mic Head: Sound pickup LCD: Working state.frequency etc Power: Turn on/off Battery Compartment: For 1pcs of batteries Shock-proof Cover: Protecting the handheld when dropping Freq Switch: To adjust freq (work with the power button) Wearable Transmitter Power and Volume control: Turn on/off power and adjust sound size Antenna: Signal reception 3.5MM Jack: Supports 3.5mm interface for headworn microphone and lavalier microphone LCD: Working state and frequency etc Battery Compartment Switch: Turn on the battery Battery Compartment: For 1pcs of AA batteries (not included) Receiver Audio Output: 6.35mm convertor Power: Push to turn on/off Charging Indicator: Under charging shows red full charged turned green Interface: 5V android type cable Antenna: Signal reception Battery Compartment: For removable battery State Indicator: Color Blue means power on Color Red means channelA Color Green means channel B Note: Due to the different display screen and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Features: 1、Crystal Clear Sound Transmission: With a frequency response range of 50Hz-15KHz and a S/N ratio of -72dB, our cordless microphone ensures excellent sound pickup and transmission. 2、User-friendly Design: The handheld microphone features a shock-proof cover for conservation against accidental drops, while the wearable transmitter offers power and volume control for convenient operation. The receiver is equipped with an LCD display for easy monitoring of working state and frequency, ensuring a hassle-free experience. 3、Long Working Distance: With a working distance of over 20 meters (65.6ft), our wireless microphone set provides you with the freedom to move around and perform without restrictions, making it ideal for stage performances, presentations, and other speaking engagements. Packing List: 2 x Microphone 2 x Wearable Transmitter 2 x Headworn Microphone 2 x Lavalier Microphones 1 x Receiver 2 x USB Cable 1 x 3.5mm Adapter 2 x Microphone Anti-roll Ring