FB-W02 USB cup warmer with 4 USB hubs

Model: FB-W02 USB Mug Warmer Details: (1)Unit Size:11x9.7x2.3cm, cup 79x73x68mm (2)Weight: 85.4g (3)Color: silver (4)Material: stainless steel pad, ABS shell Main Spec.: (1)Keep drink warm at 40-50. (2)Easy installation, no driver required, plug & play; (3)USB powered, no batteries needed; (4)With one LED for USB power and the other LED for working; (5)With ON/OFF switch; (6)Heating pad dia.: 76mm; (6)With addtional cup as set for easy enjoy your warm drink/coffee by USB during working time; also an excellent promotional gift.