Features: 2.4GHz wireless microphone, with intelligent noise reduction, real-time monitoring, fast pairing, plug and use, max-working distance of 50meters, 360 degree pickup, very suitable for mobile phone interviewing, video recording, live video, etc. DSP-intelligent noise reduction chip, high sensitivity radio, accurate identification of every detail, make your voice more real. Built-in 300mAh polymer lithium battery, Type-C fast charging interface, durable, working endurance up to about 6h. Mono-mode/stereo mode is available, which can be freely switched between mono-mode/stereo modes once, and can manage any situation where two people record simultaneously. Small in size and can be carried freely in pocket, especially suitable for vloggers, YouTuber, Speakers, interviewers, filmmaker and more. Package Includes: 2 Kinds of Packages Optional Type M1 Includes: 1x Lavalier Microphone, 1x Transmitter, 1x Receiver, 1x Windproof Cover, 1x Camera Connection Cable, 1x Phone Connection Cable, 2x Charging Cord Type M2 Includes: 2x Lavalier Microphones, 2x Transmitters, 1x Receiver, 2x Windproof Covers, 1x Camera Connection Cable, 1x Phone Connection Cable, 3x Charging Cord, 1x Charger Box Specifications: Main Material: ABS Type: M1, M2(optional) Size: Approx. 50x40x14mm/1.96x1.57x0.55inch Name: Receiver RX, TransmitterTX Simulated Output: 3.5mmTRS Sensativity: -32dB2dB Max-SPL: 120dB Simulated Input: 3.5mmTRS Lavalier Microphone Input Equivalent Input noise: 21.8dB (weighted) Frequency Range: 50Hz - 20KHz Max-Output level:+3dBu Signal to Noise Ratio: 70dB or higher Dynamic Range: 100dBA (microphone preamplifier) Working Range: 50meters (without shelter) Power Supply Mode: built-in 300mAh lithium battery Charging Port: Type-C Working Endurance: about 6 hours Transmission Type: 2.4GHz digital frequency hopping system Sound Pick-up Mode: omnidirectional Working Ambient Temperature: - 10~50 note: Please allow 0-1cm error due to manual measurement.