hông tin sản phẩm General PT3800T Frenquency Range 160~174MHz, 440~460MHz ChannelCapacity 99 Channel Spacing 12.5KHz/25 KHz Frenquency Stability 4ppm operating temperature -20℃~ +60℃ Operating voltage 7.5V DC ±20% Dimension(H×W×D) 57mm×104mm×36mm ...