KP2100 ACC KP-2100 Topside Keypad for Spa Controls 2.0" x 4.5" fits SMTD1000 and ePack SMTD1500 fits Acura Spas Controls, fits SmarTouch Digital Spa Controls, Compack Digital Hot Tub Controllers by Applied Computer Controls. With connector and 5' ribbon cable. Drops into 1.46x 4.06" cutout.