Compatibility -- This 433.92MHz remote control can copy 99% of fixed code or learning code, but cannot copy rolling code. Supported chip codes are shown in the product picture or product description. Latest RF Technology -- A radio remote control transmits and controls signals through radio waves. Non-directional and long transmission distance. The latest RF technology ensures a better transmission range. Safe and Reliable -- The shell is made of ABS and metal materials, which is safe and reliable to use. ABS has high impact resistance, is waterproof and wear-resistant. The metal material is sturdy and durable. Small and Lightweight -- Remote control size: 35*15*66 mm. Net weight: 32 g. The remote control fits in a backpack, purse, pocket, or can be worn around the waist. It comes with a key ring for easy carrying. Easy to Use -- The programming instruction manual contains the operating steps for erasing, copying, and restoring the code. The manual is easy to follow and use. You don't