The Excel toilet series optimizes the natural processes of decomposition and evaporation in a fully self-contained unit small enough to fit in a camper or cabin. And because no chemicals are used, the composted material can be tilled into the soil without fear of environmental contamination. The NSF listed Excel, plugs into a 110 outlet and incorporates a 2 vent with an internal electric fan and a thermostatically controlled heating element. The Excel NE (non-electric) relies on a larger 4 vent for evaporation and elimination of any restroom odors. Each toilet includes venting material and start-up supplies of Compost Sure, Microbe Mix and Compost Quick. Available: Excel Excel NE Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Portable Toilets.