COMPATIBLE 2 TX + 1 RX + Charging Case For DJI Mic Mini 1. Small and light, no sense of wearing 2. High-quality audio, stable transmission 3. Charging box has a long battery life of 48 hours 4. Direct connection to DJI OsmoAudio products, original sound quality 5. Active noise reduction, two adjustable levels 6. Automatic limiter, anti-explosive sound Technical parameters: --DJI Mic Mini transmitter 1. Dimensions: 26.55 mm long, 26.06 mm wide, 15.96 mm high 2. Weight: about 10 grams (without magnetic sheet) 3. Wireless mode: GFSK 2Mbps 4. Equivalent isotropic radiated power (EIRP): less than 20 dBm 5. Wireless mode operating frequency: 2.4000 GHz to 2.4835 GHz 6. Bluetooth protocol: Bluetooth 5.3 7. Bluetooth operating frequency: 2.4000 GHz to 2.4835 GHz 8. Bluetooth transmission power (EIRP): less than 20 dBm 9. Battery type: Li-ion 10. Battery capacity: 114 mAh 11. Battery energy: 0.44 Wh 12. Battery voltage: 3.87 V 13. Charging specification: maximum 5 V 14. Charging environment temperature: 5- 45 degrees Celsius 15. Working environment temperature: -10- 45 degrees Celsius 16. Charging time: about 90 minutes 17. Working time: about 11.5 hours (using DJI Mic Mini (one transmit and one receive), without noise reduction function, in a non-interference environment, close-range sound reception, transmitter and receiver connected, and receiver connected to the camera with a 3.5 mm cable.) --DJI Mic Mini receiver 1. Size length 46.50 mm, width 29.61 mm, height 19.32 mm 2. Weight: about 17.8 grams (including interface cover) 3. Wireless mode: GFSK 2Mbps 4. Equivalent isotropic radiated power (EIRP): less than 20 dBm 5. Operating frequency: 2.4000 GHz to 2.4835 GHz 6. Bluetooth protocol: Bluetooth 5.3 7. Bluetooth transmission power (EIRP): less than 20 dBm 8. Bluetooth operating frequency: 2.4000 GHz to 2.4835 GHz 9. Battery type: Li-ion 10. Battery capacity: 170 mAh 11. Battery energy: 0.66 Wh 12. Batter