Comica BoomX-D Compact 2.4 GHz Dual Wireless Microphone System for Android Smartphones

Wireless Band 2400 - 2483.5MHz Transmitting Power +10dBm Receiving Sensitivity -86dBm Antenna PCB Antenna Polar Pattern Omnidirectional Frequency Response 80Hz - 20kHz Sound Delay <20ms External Mic Input Interface 3.5mm TRS Battery Built-in Li-ion Battery 300mAh 3.7V Battery Life 5 Hours Operating Temperature 32 - 122 Degree F (0 - 50 Degree C) Dimension 1.49 x 0.86 x 2.16" (39 x 22 x 55mm) Weight 1.02 oz (29g) Wireless Band 2400 - 2483.5MHz Transmitting Power +10dBm Receiving Sensitivity -86dBm Antenna PCB Antenna Audio Output Amplitude +0dB - +12dB Sound Delay <20ms Data Interface USB-C Monitoring Interface 3.5mm TRS/TRRS Operating Temperature 32 - 122 Degree F (0 - 50 Degree C) Dimension 1.29 x 0.51 x 2.75" (33 x 13 x 70mm) Weight 0.67 oz (19g) Battery Info required, included Battery Material Lithium ion Battery Quantity 2 Battery Type -