The Chamberlain TX4RUNI is a 4-channel, 433 MHz universal remote control. This transmitter can be programmed to work with all Chamberlain gate and garage door openers that are equipped with 433 MHz wireless. The remote features a slim and ergonomic design, a handy white LED indicator, and a control range of up to 300m. It is compatible with older MotorLift, PowerDrive, and HomEntry operators. The package includes the remote control, a battery, and a key ring holder. Dimensions: 21.7 x 8 x 3.9 cm. Weight: 22g.