Liftmaster K20-1050B-1RSX Motor 1/2 Horsepower plug-in Does the T-21 have battery

Does the T-21 have battery backup

Designed for compatibility with Multi-Code (300 MHz) and Stanley (310 MHz) transmitters

Transmitter Capacity: 250 transmitters

intermittent

Liftmaster K20-1050B-1RSX Motor 1/2 Horsepower plug-in Does the T-21 have batteryReplacement AC Motor for LiftMaster SL3000U and CSW200U Operators The LiftMaster K20 1050B 1RSX is a 0. 5 horsepower AC motor engineered for direct replacement in SL3000U, SL3000UL, CSW200U, and CSW200UL gate operators. This continuous duty motor restores full power and performance to LiftMasters high cycle gate systems. Built to OEM specifications, it ensures reliable operation in residential and commercial environments. Key Features 1 2HP continuous