Chamberlain 1/2Hp Chain Drive Opener

Drive Type: Long-lasting chain drive.Trusted security: Security+ 2.0 technology provides unmatched encryption (100 billion codes).BILT® intelligent instructions: 3D instructions for a quick, easy installation. Lifting Force 1/2HPSupport standard aluminum doors with a lift force equivalent to 1/2 HP*.Durable ChainCount on long-term reliability with the durable chain drive system.