The CST-1 has solved the age old problem of accurate short cycle timing. The only unit of it's kind designed specifically for the control of grow systems. Easy to set and operate. Solid state time counter with adjustable frequency and duration. The CST-1 function timer has many uses and only a few of them include: fogging or misting, spray stakes or drip system timing, air pumps, CO2 equipment and intake exhaust fan control. The CST-1P includes a photo sensor to limit operation to daylight periods only. Operates on 110 VAC with 15 Amp.