Specifications Hign-concerned Chemical:None Wireless Communication:RF Use:TV,Air Conditioner,Computer,Universal,Projectors,Audio / Video Players,Camera / Video Camera,Speaker,Lighting,Electric Door,Automated curtains Origin:Mainland China 3000m Long Range Distance High Power 1CH 2CH 4CH 1 2 4 for CH RF Remote Control Transmitter 433 MHz Features: Please notice: This is not for face to face copy or cloning or duplicating. It is only a common RF remote control(transmitter so it is only the professional can buy it alone or who buy our remote receiver, then need additional transmitter. If you are freshman about RF remote control system, please buy the duplicating/cloning /copied remote control. We are So Powerless about the people who do not understand then find it is cheap and buy it, when he gets it and tell us it doesn'for t work with his rolling code or other receiver... and give us the negtive feedback. Specifications: Material: Plastic + Metal Color: Gray Size: 1594325mm/6.261.690.98in (Approx.) Type: 1#: 1 Button; 2#: 2 Buttons; 3#: 4 Buttons; Channel: / / 2 / 3 / 4 / for CH (Optional) Remote Control Distance:0-3000m ( for Ideal distance without any block and interfere, it would rise and fall about 10%-90% with and Encode: 2262 Frequency: 433 MHz Power Supply: for DC 9V (NOT included) Standby Current: 0mA Working Current: >80mA Modulation System: ASK Working Temperature: -10 ~ +70 Quantity: 1 PC (other accessories in the picture is not included) Note: 1.Transition: 1cm=10mm=0.39inch 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 1 Remote Control Transmitter(Not including (No retail package)