Description Stanley circuit board model 921-3528, same as model number 360-3528 Compatible with ALL 1993-1996 garage door openers Compatible with the following Stanley garage door operator model number: D1000, D2000, GL450, GT200, GT300, GT400, MT310 pace, SB600, SL700, ST100, ST200, ST300, ST400, ST500, TT200, TT300, V1000, V2000, BT200, PT210, PB240, PT300, PL500, PT600, UB210, UB400, UL500, UT200, UT300 310 Mhz frequency, safety sensor compatible Original manufacturer part, with full 1 year manufacturer warranty