29-40 gallon. 12" x 24" Panel. 13.5 VDC-9 amps / 120 VAC-1 amp. Dual Voltage / Duel Element, 12 VDC/120 VAC, Two-in-one. Great Retrofit option on older RV's with smaller power converters. 12 volt when in transient and power usage is low, switch over and use the 120 volt side once parked. Prevent holding tanks from freezing, even in negative temperatures. Power on when the outside temperature is just above freezing and falling, fluids must be present when in use. Has built-in sensors to cycle heaters for power savings, and maintain tank contents between 44degreeF and 64degreeF. Power off when the outside temperature rises to remain above freezing. Peel-n-Stick install. 13.5 VDC must be wired thru on/off switch (not included). Made in the USA.

 PROP 65 WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov