15 Minute, Double Pole Single Throw (DPST), Screwmount Applications: Battery chargers, ultrasonic cleaners, saunas, tanning beds, medical equipment, dryers, small appliances, and food service equipment. Standard Features • 15 amps per pole rating • 120/240V, 1/4 HP • 1000W Tungsten Approvals • UL, CSA, BSI, VDE, OVE, SEV, KEMA, SEMA, NEMKO, UTE This timer has 4 terminals. When you turn this timer to the right, it sets time and counts down to off. When you turn to the right, it stays on until turned off. You should not use this timer in a tanning bed Poltik manufactured the series 600/601 for Diehl under the brand name of Diehl, Diehl got out of the spring wound business about 2012, so now Poltik is selling them under their own brand, nothing has changed with any of the units except the name. The timer you receive may say Diehl or Poltik, depending on our stock, the the specifications will be the same