Fish Hand Warme Model:RV-1211 Size: 9*7 CM 1: Lovable shape, novel model, easy carrying-on, and long service life. 2: Adopted with multi unique technologies and compounds, featuring reasonable structure, rarefied techniques, and solidity and wearing resistance. 3: Effective for prevention and auxiliary curing of arthritis, lumbago, headache, cervical spondylopathy and chilblain. 4: Charged with 20-30 min for 1-2 hours thermal preservation. Performance Parameters:Power supply : 220VPower frequency : 50 (Hz)Temperature range : 50??-60 ??Heating time : 20-30 (Min)