There are safety sensors that reverse the door when there is crossing of objects on the beam or contact to a person or an object. The 2 key differences being motor power and backup battery. Chamberlain B970 $ 270.00 – $ 420.00. So keep reading. Powered by Chamberlain’s Max Lift Power System, the B970 delivers lifting force equivalent to 1 1/4 HP, the highest lifting capacity in the category for superior performance in extreme conditions Superior range - Includes 2 3-button remote controls that let you control up to 3 openers. Chamberlain B970 delivers the highest force of lifting. The Chamberlain Group is a well-established brand that deals with various home automation solutions, including garage door openers and gate openers. For your safety, the Chamberlain B970 and the Chamberlain B980 come with safety sensors to detect obstructions and motion detectors that will automatically turn lights on. The B750 has a smaller motor power 0.75hp compared to 1.25hp, although both door openers have the same lift capacity. Some other popular brands under the Chamberlain Group is Liftmaster and myQ. 1-1/4 HP Ultra-Quiet Belt Drive Smart Garage Door Opener with Battery Backup. The Chamberlain B750 and B970 are much more similar in terms of specifications. Chamberlain garage door openers with yellow or blue force adjustment dials flash the LED next to the Learn button to indicate a component failure. The automatic lights feature simply switched the light on when entering the garage. Even though the 1.25 h.p. In this guide, we’ll give you the step-by-step guide to Chamberlain garage door opener troubleshooting. The Chamberlain C870 is the chain drive version of the B970, and is a little bit less expensive, too. strength of the B970 is enough to lift any door, this opener may not be the best choice for extremely heavy doors that have a hard take off from the ground. Neither will intruders, thanks to the Posi-lock anti-theft protection. High performance. The posilock anti-theft protection on the chamberlain B970 ensures the door remains locked once it is closed. There are actually only two key differences between the Chamberlain B970 and the B980. 5.