SELL wall switch timer

One Hour Manual Timer Ideal for operating attic, kitchen and bathroom ventilatiing fans, heat lamps Set timer manually (0 to 60 minutes) Turns off automatically after preset time Use inplace of wall switch Mounts in 2 1/4 x 4" gangable switch wall box 3" deep SPST Rating: 20 amps, 125 V.Z.C., 1h.p.; 10 amps, 250 V.A.C. 1 h.p.; 10 amps, 277 V.A.C., 7 amp 125 V.A.C. Tungsten rating. UL listed