two channels generates unique code code can easily be changed for safety purposes LED transmit indicator RED compliant (ETS 300-220) (approved for EU countries) high brightness white LED flashlight function compatible with: [product name=VM130V2-R]VM130V2-R[/product] power supply: 12 V battery (not included) wireless frequency: 433 MHz (RF) max. RF power transmission: dimensions: 63 x 35 x 13 mm (2.5" x 1.4" x 0.5") (EN)