Check the listing for details. Lavalier Microphone Wireless Audio Video Recording Mini Mic For Android/iPhone. Condition: New. Listed at 16.79 USD. Features ---This Lavalier microphone has its own intelligent charging compartment, which can be charged wirelessly anytime and anywhere. ---360° omnidirectional radio, high sensitivity pickup, high fidelity recording, high-definition sound quality. ---20m unobstructed transmission. ---Full power, 6H long battery life, worry-free. ---Automatic code matching, plug-and-play. Specifications ---Operating frequency: 2.4Ghz ---Sensitivity: -26DB ---Transmission delay: 15ms ---Frequency response range: 20-20KHZ ---Signal to noise ratio: 64DBM ---Transmission distance: 20M (without obstacles) ---Size: 6*1.3*1cm ---Built-in battery capacity: 300 mA ---Charging time: 2.5H Package included ---Two (2) Microphone ---One (1) Receiver ---One (1) IOS adapter ---One (1) Charging cable ---One (1) Charging case ---Instruction manual.