FeatureThe insulation base uses aluminium alloy heating plate PTCS heater. Low power can heat up quickly and keep coffee warmer stable continuous heating anti-overheating technology waterproof panel design no leakage current.Automatic shut-off: our cup warmer with automatic shut-off function after 4 hours of work.Three Temperature Control: Our electric cup can reduce the cooling speed of hot drinks. It can also heat the coffee to 104 F / 40 C-55C/ 55 C- 65 C/65 C- 75 C which is maintained all day long. It is neither too hot or too cold.Various cups: whether you are cups glass pots ceramic mugs stainless steel kettles glasses and milk bottles you can heat them.This USB desktop coffee heaters is the perfect gift for family and friends on Christmas Valentine's Day Thanksgiving and birthdays.Notice:1.Actual color may be slightly different from the image due to different light effect2.Please allow 1-3cm deviation due to manual measurementDescription:Parameters: 120V 60Hz 30WInsulation temperature: 100F-170F (40C-75C)Gear adjustment: high medium and low three gear adjustmentDigital display: temperature time displayTiming adjustment: 2-12 hours timing shutdown default 4 hours shutdownOperation mode: touch buttonSafety method: touch switch + gravitys sensor double protectionHeating diameter: 9.5cmHeating surface: aluminum alloyWire length: 1.5 metersSize: 150X120X25mmincludes:1x USB Coffee Warmer"