Big PTT Group switch Wireless Microphone work with realptt, with zello,push to talk Bluetooth version 4.2 Bluetooth protocol HFP / HSP / A2DP / AVRCP / SPP Transmission range 10m Transmission power CLASS2，4dbm＜br> Audio performance SBC Decode Audio to Noise ration ge75dB Speaker power 1W/8R（116dB） LED indicator Blue/Green LED Indicator Earphone jack 3.5mm，support PPT earphone Battery capacity 2000mA/3.7V Size 63 25.6 90.
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