1. The DJI Mic 2 Charging Case can charge two transmitters and one receiver to reach up to 18 hours of operating time for unlimited creation.2. It can store the transmitters, receiver, and mobile phone adapters (USB-C and Lightning) for convenient carrying. 3. It also automatically links the receiver and transmitters, so you can get started right after opening the case.4. It is recommended to use a 5V, 2A charger to charge the charging box. At room temperature, the DJI Mic 2 charging box takes approximately 1 hour and 10 minutes to fully charge both the transmitter and receiver. Fully charging the charging case alone takes about 2 hours and 40 minutes.5. Compatibility: DJI Mic 2Packing list:DJI Mic 2 Charging Case × 1DJI Mic 2 Carrying Bag × 1Specification: Package Weight One Package Weight 0.20kgs / 0.45lb One Package Size 20cm * 14cm * 8cm / 7.87inch * 5.51inch * 3.15inch Qty per Carton 16 Carton Weight 4.30kgs / 9.48lb Carton Size 42cm * 30cm * 3cm / 16.54inch * 11.81inch * 1.18inch Loading Container 20GP: 7054 cartons * 16 pcs = 112864 pcs 40HQ: 16376 cartons * 16 pcs = 262016 pcs