2010 4-портовый USB-грелка

2010hot sell usb warmer for promotional gift Usb warmer/ usb warmer cup/ usb warmer with hub/ usb insulation pad Various colours selection; Flowery and individual LOGO can be designed, suppliers and distributors can choose it as promoting and advertising gifts; Considerate design, no national bunderies propagandization, wonderful promotion gift 1) To maintain coffee / tea / drinks at the temperature of 40-60 , easy to install, no need-driven, hot-swappable 2) Voltage Rating: 2.5 W-5V DC, a single on / off conversion system, Switch button to change to warm,with LED indicatorturns red. 3)USB port,support USB2.0 and 1.1 4)powered by USB port,no external power source required. 5)Provide the CE ,FCC,ROHS certifications.