Sends audio signal wirelessly for convenient use Wireless sound transmission for convenient use, Portable, Use with DJI Wireless Microphone Windscreen to eliminate noise generated by wind, Long battery life of up to six hours, Remote shutter control (requires DJI Pocket 2 Do-It-All Handle and DJI Pocket 2) In The Box:DJI Wireless Microphone Transmitter × 1, DJI Wireless Microphone Windscreen × 1 Specifications:Dimensions: 50×28.6×22.8 mm, Weight: 21.4 g, Battery Type: LiPo, Battery Capacity: 320mAh, Principle of Acoustics: Pre-polarized pressure transducer, Audio Pickup: Omnidirectional, Frequency Range: 50 Hz -20 kHz, External Mic Input: 20 Hz - 20 kHz, Maximum SPL: 116dBSPL (1kHz@1% THD), Analog Input: 3.5mm input, Adapter: 5 V/2 A, 5 V/1 A, 5 V/0.5 A, Operating Temperature: 0° to 40°C (3° to 104°F), Frequency: 2.400-2.4835GHZ, Power: 2.4GHz <13dBm(FCC); <10dBm(CE); <12dBm(SRRC); <10dBm(MIC), Charging Time: 60 minutes Compatibility:DJI Pocket 2 Do-It-All Handle