Elegant USB Office Cup Warmer with 4 Port Hub Four USB ports, optional USB 1.1 or 2.0 version With On/Off switch ... , with DC port Elegant USB Office Cup Warmer with 4 Port HubProduct description1) Keep ... material around the metal hot plate prevents burns. with DC port7) With On/Off switch, with DC portSpecification:1) Product Size: 11x9.7x2 ...