Base Radio GR3188 for MOTOROLA Frequency Range:146-174, 403-440, 438-470MHz Channel: 8 Power Supply:13.8V DC 220V ... so on revision relaying latency Frequency range 146-174; 403-440; 438-470MHzchannel number 8channel spacing 12.5/25 KHz(VHF ... / Base Radio GR3188 for MOTOROLA Frequency Range:146-174, 403-440, 438-470MHz