Features: 2.4G Mini Wireless Microphone System2.4G wireless signal transmission, more stable and more clear; the max. effective transmission range can reach up to 197ft in open area, and obstructed transmission distance is about 98ft. 8 Channels to Avoid InterferenceSupports 8 channels flexible matching. You can press the channel button to switch the channel to prevent interference when there are other channels disturbing in the same space or near distance. Real-time Audio Recording MonitoringThe receiver has 3.5mm headphone interface, you can listen to your recording audio in real-time with headphone to ensure accurate sound and complete your recording at one time. Built-in Rechargeable Lithium BatteryThe transmitter and receiver both have built-in 500mAh rechargeable lithium battery, which can be recharged via the provided USB cables, and working time is up to 12H after fully charging. With Phone Holder & Mini Desktop TripodComes with an adjustable phone holder and a mini desktop tripod, allowing you to get the perfect recording anytime needed, suitable for live streaming, online course, interview, etc. Specifications: Brand: Andoer Color: Black Frequency Range: 2.4G Frequency Response: 16Hz-18KHz Dynamic Range: 81dB Battery Capacity: 500mAg Polar Pattern: Omnidirectional Max. SPL: 120dB Self Noise: -100dB Delay Time: >10ms Effective Range: max.197ft(in open area), 98ft(obstructed) Packing List: 1 * Transmitter 1 * Receiver 2 * 3.5mm Audio Cable 1 * Lavalier Microphone 2 * Mic Windscreens 1 * USB Charging Cable 1 * Cold Shoe Adapter 1 * Tripod 1 * Phone Holder 1 * Carry Case