DJI wireless microphone set, convenient with charging case. Lavalier microphone wireless - Brand: DJI - Model: Wireless Microphone - Display: LED indicator - Accessories: Charging case, wind jammer (windscreen), USB cable, 3.5mm audio cable, storage pouch DJI Mic Transmitter Model AST01 Size 47.32×30.43×20.01 mm Weight 30 g Wireless mode GFSK 1 Mbps and 2 Mbps EIRP (Effective Radiated Power) <20 dBm Operating frequency 2400〜2483.5 MHz Battery type LiPo 1S Battery capacity 320 mAh Battery power 1.23 Wh Battery voltage 3.85 V Charging temperature range 5℃〜45℃ Operating temperature range -10℃〜45℃ Charging time 70 minutes Operating time 5.5 hours DJI Mic Receiver Model ASR01 Size 47.44×32.21×17.35 mm Weight 24.9 g Wireless mode GFSK 1 Mbps and 2 Mbps EIRP (Effective Radiated Power) <20 dBm Operating frequency 2400〜2483.5 MHz Battery type LiPo 1S Battery capacity 320 mAh Battery power 1.23 Wh Battery voltage 3.85 V Charging temperature range 5℃〜45℃ Operating temperature range -10℃〜45℃ Charging time 70 minutes Operating time 5 hours Charging Case Model ASB01 Size 103.06×61.87×41.50 mm Weight 162.2 g Battery type LiPo 1S Battery capacity 2600 mAh Battery power 10 Wh Battery voltage 3.87 V Charging temperature range 5℃〜45℃ Operating temperature range 5℃〜45℃ Charging time 2 hours 40 minutes Operating time Up to 1.8 times, fully charges three modules simultaneously. Microphone recording direction Omnidirectional Frequency response Low cut Off: 50 Hz〜20 kHz Low cut On: 150 Hz〜20 kHz Maximum sound pressure level (SPL) 114 dB SPL Maximum input level (3.5 mm) -17 dBV (THD < 0.1%) Equivalent noise 23 dBA Maximum output 22mW@1kHz, 32Ω