PRODUCT FEAURE : With ASK technology Good performance of stability Attractive appearance Easy to learn or duplicate Specification : To prevent lost and replace your old remotes 1.self learning remote control 2.use for car alarms , home alarms garage door , office alarm etc 3.learning face to face in seconds encoder models ; can copy most of remote controls in the market. frequency: customized( 315MHz~ 433MHz) shoot distance : 150M( open spaces ) power dissipation: 0.12W battery model : 27A voltage: 12v button: 4 home alarm ; commercial alarm ; office alarm system ; hotel and KTV alarm system you can enjoy more Convenient life with our wireless remote controls ! our products : Excellent in quality and reasonable in price! the best choice in china! our sales and products are very famous in all over the world. We have built branch in Guangzhou, Beijing, Nanjing, Hongkong, and Taiwan. Also our products have been sold to Germany, Singapore, Korea, Malaysia and other countries.