DJI Mic Mini Transmitter (Infinity Black)

Specifications
General    
Polar Pattern: Omnidirectional
Frequency Response
Low Cut Off: 20 Hz - 20 kHz
Low Cut On: 100 Hz - 20 kHz
Maximum Sound Pressure Level (SPL): 120 dB SPL
Equivalent Noise: 24 dBA
Max Transmission Distance: 400 m
Measured in an open, unobstructed environment free of interference, and is for reference only.
DJI Mic Mini Transmitter    
Model: DMMT01
Weight: Approx. 10 g (excluding the clip magnet)
Wireless Mode: GFSK 2Mbps
Equivalent Isotropic Radiated Power (EIRP): < 20 dBm
Wireless Mode Operating Frequency: 2.400-2.4835 GHz
Bluetooth Protocol: Bluetooth 5.3
Bluetooth Operating Frequency: 2.400-2.4835 GHz
Bluetooth Transmitter Power (EIRP): < 20 dBm
Battery Type: Li-ion
Battery Capacity: 114 mAh
Battery Energy: 0.44 Wh
Battery Voltage: 3.87 V
Charging Specification: Max 5 V
Charging Temperature: 5° to 45° C
Operating Temperature: -10° to 45° C
Charging Time: Approx. 90 minutes
Operating Time: Approx. 11.5 hours
Measured using DJI Mic Mini (1 TX + 1 RX), with noise cancellation off, during close-range audio recording under interference-free conditions, with the transmitter connected to the receiver and the receiver connected to a camera via the Camera Audio Cable (3.5mm TRS).