Product details:

Ideal for nitrous applications, allowing you to activate nitrous at a predetermined RPM and have it shut off before peak RPM. Microprocessor controlled RPM activated switch! Are you looking for ways to better control your race performance? Don't worry about fumbling around with plug-in modules or, worse yet, losing them. Use our RPM-activated switches instead! They have internal DIP switches for RPM settings, that let you fine-tune to just about any RPM, from 2,000 to 9,900 in 100 RPM increments, so you're not stuck with a set range. The switches also feature a blue LED to let you know when the desired RPM is reached for easy testing, a green LED power indicator and extensive input- and output-protection circuitry. Guaranteed that you can't blow them up! Uses Push Buttons and Digital Display to program the switch. Works with 4, 6, or 8 cylinder engines. RPM Range: 2,000 to 9,900 RPM (four LED Digits). Choose Normally Open - turn on an accessory at the desired RPM and Turn it Off at a second higher RPM) or Normally Closed (turn off an accessory at the desired RPM and turn it back on at a second higher RPM). Also Functions as a Digital Tachometer with High RPM recall function. No need to remove cover to program. Over current protection, Short circuit protection, Over voltage protection.