There is a red ON/OFF switch knob (dimension de l'enveloppe: env., 92 x 92 x 62mm /3., 6 x 3,6 x 2,4 pouces (L*W*H); Thème de la variation: taille Aexit AC 240V Control electrical 20A 175 PSI 12 Bar 4 Port 4 Female Port Switch 240 Volt Air Compressor Pressure Switch 240V Pressure Control Valve It runs on 240V, handles up to 26A current, and works within 107-149 PSI. The switch has a red ON/OFF knob and four female air ports (about 0.4 inch threads), so it's easy to install and helps save energy by auto-controlling your compressor's load and unload cycles Easy to install and convenient to use (f5d1cdc1-1b25-11ea-9a1e-4cedfbbbda4e Air Compressor Pressure Switch Control Valve 120PS... – Grandado Maximum Voltage: 240V; Current: 26A; Maximum Pressure: 107-149 PSi