CDVI's high quality RADIUM transmitters/receivers are the perfect solution to operating parking gates, garage doors, wheelchair-accessible doors, etc. These 433 MHz radio frequency systems offer longer range (up to 250m (820ft), less interference jamming and excellent reliability. KeeLoq® Rolling Code technology ensure ultra-secure transactions. CDVI also provide the highest security level possible with its AES 128-bit encryption wireless receiver and remotes product line combined with its exclusive rolling-code algorithm