Features: * This wireless microphone set adopts UHF (Ultra High Frequency) frequency band with strong anti-interference ability. High sensitivity and good sound quality, suitable for business meetings, performances, teaching, live performances and other occasions. * Using the UHF (Ultra High Frequency) frequency band, the wireless microphone has the advantage of strong anti-interference ability. * Very high sensitivity and good sound quality make your speech or singing more clear. * The transmitter is powered by 2 AA batteries (not included) and the receiver is powered by a 1200mAh rechargeable lithium battery. * The transmitter and receiver are far away, suitable for business meetings, speeches, teaching, live performances, etc. Specification: Transmitter: Frequency range: 677.7~696.30MHz Number of channels: 16 (each time pairing, the ID code changes randomly, within the frequency range set by the manufacturer) Oscillation mode: DSP chip frequency locking Frequency Stability: 10ppm RF power: 10dBm Audio frequency response: 40~18000Hz Distortion: 0.5% Battery: 1.5V AA alkaline battery (without) Use time: 4~8 hours Receiver: Frequency range: 677.7~696.30MHz Number of channels: 16 (each time pairing, the ID code changes randomly, within the frequency range set by the manufacturer) Oscillation mode: DSP chip frequency locking Frequency Stability: 10ppm Receiving sensitivity: -95~-71dBm Audio frequency response: 40~18000Hz Distortion: 0.5% Signal-to-noise ratio: 90dB Audio output: 300mV Lavalier Microphone Packing included: 1 * Transmitter 1 * Receiver 1 * Lavalier Microphone 1 * 3.5mm Cable 1 * 18650 Battery Headset Microphone Packing included: 1 * Transmitter 1 * Receiver 1 * Headset Microphone 1 * 3.5mm Cable 1 * 18650 Battery