19[ 134 ]19. Technical informationWeight4.2 oz. with standard batteryTransmitting power1.6 wattOperating voltage3.6v DC, 12VDC for car kitNetworksGSM 1900Frequency band1850 - 1910 MHz (TX)1930 - 1990 MHz (RX)Number of channels299Memory locationsUp to 250 in SIM