Frequency range 136-174 MHzII2G Ex ib IIC T4 GasII2D Ex tD ibD A21 IP6X T110C DustIM2 Ex ib I Mining1.2W Output power16 ChannelsBattery life 18 hour (batt save off) 23 hour (batt save on)Operating Temperature Range -20 to +50Weight 279g - 484g with ...