New and high quality Channel scan Channel lock Automatic squelch Automatic battery save Built-in flashlight Selective channels LCD backlit Auto channel scan Page tone alert Low battery alertSpecifications: Frequency: 409-410MHZ Transmit power: 0.5W Batteries: Use 1x 9V batteries (not included) Communication Range: 40-50 meters indoor， outdoor 100-200 meters， open area 800 m Dimension: 7.09 x 2.95 x 2.36 in Shell Material: High-quality plastic