Balboa Lite Duplex Digital 4 button topside panel - Used with GS 501 controllers and also used on many spa packs including Signature Spas Sig10, Sig10L, Sig501, and Leisurerite Spas (Sig 10 - no light - the temp button is in the light button position - no overlay of this configuration available. ie the temperature will operate on the light button) 161mm x 57mm. Hole required - 136mm x 35mm