Features: 2.4G Wireless Microphone SystemTwo transmitter triggered by one receiver set, adopts 2.4G global free frequency and effective transmission range is up to 30M. Real-time Audio MonitoringThe receiver has a 3.5mm earphone interface, supports real-time audio monitoring to ensure clear recording and keep the microphone work properly. Wide ApplicationIncludes 3.5mm TRS & TRRS audio cable, compatible with smartphone/ camera/ camcorder, suitable for vlog, live streaming, interview, video recording, etc. Built-in Rechargeable BatteryThe transmitter and receiver both have built-in rechargeable battery that can be charged via the provided USB cables, long working time and convenient recharging. Lightweight and PortableLightweight and compact design, and comes with a zippered storage case, can be placed into your backpack, very convenient to carry around. Specifications: Color: Black Effective Range: max.30M Signal to Noise Ratio: >75dB Sensitivity: 90dB Battery Capacity: 3.7V 400mAh(transmitter), 3.7V 350mAh(receiver) Item Size: 4.5 * 4.3 * 1.7cm/ 1.8 * 1.7 * 0.7in Item Weight: 25g/ 0.9oz Packing List: 2 * Transmitters 1 * Receiver 1 * 3.5mm TRS to TRS Cable 1 * 3.5mm TRS to TRRS Cable 2 * USB Charging Cables 1 * Carry Case