Specifications: Operating frequency: 433 (433.92) MHz Rated voltage: DC 12V Battery: 12V 27A (included) Size: 54 x 29 x 14 mm Weight: 28 g Working current: 10mA Radiated power: 10mw Transmission distance: 50-100M Package includes: 4 x remote control key fobs 1 x manual Note;only works for 433MHz,transmit distance is 50-100m(Open space) ,bringing you new experience of remote control and much convenience in your daily life. 1.Garage door oponer, cloninh and duplicate your existing remote controllers for cars, car sunroofs, garage doors, gate doors, heating Systems, home automation e.g 2.Popular model, new designs with a cover and the ABCD four buttons could respectively copy four different types of chips, that is a remote control can operate four different types of facilities. 3.Durable and the color will never fade,water plating ensure the endoran ,High accuracy of copying and high effective of copying,duplicate your existing remote control in case you lost it.. 4.Ultra-small error of copying data code and copy oscillation resistance. Privacy is strong. But you need to noted it can't copy rolling code