USE ANYWHERE: Our heating pad is 23.6 x 11.8 inches, only weighing 4.76 oz, easy to carry and store. Comes with a 59-inch type-c power cable, this USB heating pad can be connected to power supply for use, suitable for home, office, car, travel and so on.3 HEATING LEVELS WITH AUTO SHUT OFF: One button to adjust the temperature with indicator, the heating pad with auto shut off has 3 heating levels to switch from, high temperature with red indicator (55-57℃/ 131-134℉), medium temperature with blue indicator (50-52℃/ 122-125℉) and low temperature with green indicator (45-47℃/ 113-116℉). Support 2-hour auto shut-off, intelligent and convenient.5V LOW VOLTAGE: Adopting low voltage technology, with the input of 5V 2A, this 5V USB heating pad is compatible with most 5V USB outlets such as your own power bank, USB adapter and car charger, quick to charge and convenient to use.EFFECTIVE PAIN RELIEF: The inside graphene heat sheet is 13 x 5.9 inches, offering you even heat and warmth. You can apply this heating pad to your cramps, back, shoulder for pain relief, to alleviate muscle tension and promote blood circulation.SAFE AND ENERGY-SAVING: Made of soft polyester material, skin-friendly and comfortable. This heating pad can be machine washed. Compared with other electric heating pads, this cordless heating pad can be used for 100 hours under 1Kwh, energy-saving and environmental-friendly.