Safe to Use Adapter for Digitech Alesis are made of durable, high-quality materials and tested by the manufacturer to meet OEM standards. Over-Voltage protectionOver-Load protectionShort-Circuit protectionOverheating Protection Pure Copper Core High-quality pure copper core, accelerates and flattens conduction and transmission. The conduction speed is fast and the transmission is stable. Compatibility Power adapter is for Mr.Heater F274800, F274830, F274865, F276127. works with Mr.Heater Big Buddy Heater MH18B and Tough Buddy Heater models, such as MRH-MH18B, MRHMH18B. Not applicable to Mr.Heater MH9B, MH12B series heaters. Specifications: Input volatage is 110V-120VAC @60Hz; Output rating is DC6V800mAPower cable: Long 6.5 FT(2M) Power Cord, gives you space to move and position the heater. Our heater ac adapter is equipped with a copper core voltage stabilizer, the output voltage is stable, the frequency is stable during charging, there will be no short circuit problem, and the safety performance is good. long lasting.