This product is a wireless remote control key, remote control equipment such as rolling shutter door and garage door within 50m-100m(free space). Bring you a new remote control experience, bring more convenience to your .NOTE: Please that your receiver function is working properly before purchasing, because this product needs to be matched with your receiver first.Disclaimer: Your remote control must be consistent with the picture described by us, and your remote control and model must be in the compatibility list of the store.Frequency:433mhzCode:Rolling codeButtons:4Battery:Include BatteryDistance:50m-100mScope of application:garage door, alarm, automatic door, rolling door, etcWeight:0.027(kg)Size:6.8x4.0x0.9(cm)Colour:BlackMaterial:ABSPackage Contents:1 * Remote ControlOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.