Frenquency Range 136~174MHz 420~470MHz ChannelCapacity 16 Channel Spacing 12.5KHz/25KHz Frenquency Stability 2.5ppm operating temperature -25℃~ + 55℃ Operating voltage 7.5V DC ±20% Dimension(H×W×D) 54mmX119mmX34mm Weight(with bracket) 255g Battery ...