Enjoy! #FF-This hashtag mostly shows up on Fridays, which should give you a good indication of what one of the Fs means. The other stands for Follow, and the two combine to make the phrase Follow Friday.. Follow Friday is essentially a Twitter holiday with the aim of getting people to follow one another.
Technical. Original manufacturers part,390 Mhz frequency, 9-volt battery operated, part number 976LM a 977LM keypad is substituted per the manufacturers change, Color: Grey Works with all Liftmaster, Sears and Chamberlain garage door openers, utilizing the 390 Mhz frequency.echnical. Original manufacturers part,390 Mhz frequency, 9-volt battery operated, part number 976LM a 977LM keypad is substituted per the manufacturers change, Color: Grey Works with all Liftmaster, Sears and Chamberlain garage door openers, utilizing the 390 Mhz frequency.
The cost is excellent, and it offers very respectable 14 SEER performance. The Duration compressor is dependable and the unit is backed by a 10-year limited warranty. Most homeowners will get 15-20 years service from this model. Medium Price: 3 Ton Dave Lennox Elite Series XC16 Central Air Conditioner: $2,199.he 17.2 SEER rating means lower energy bills and features like Humidtrol and quiet operation make the Dave Lennox Elite Series XC16 3 ton central air conditioner a popular choice. High Price: 3 ton Armstrong Model 418LE 18 SEER Central Air Conditioner: $2,389.