Features: 1.Made of good quality ABS, sturdy, wearable and durable. 2.Portable and lightweight, easy to carry and store. 3.Two purpose, can be used to make drink cool or hot. 4.Supports direct power supply from computer via USB interface, convenient to use. 5.Practical product to let you get cool drinks in summer and hot drinks in winter. specification: Made of good quality ABS, sturdy, wearable and durable. Portable and lightweight, easy to carry and store. Two purpose, can be used to make drink cool or hot. Supports direct power supply from computer via USB interface, convenient to use. Practical product to let you get cool drinks in summer and hot drinks in winter. : Material: ABS Color: Black, White (optional) Voltage: 5-9V Rated power: 5-8W USB mode cryogenic temperature: 8 to 10 External power supply cryogenic temperature: -3 to -2 USB mode heating temperature: 65 External power supply heating temperature: 105 Power Consumption: 5V 800mA(USB cooling), 5V 1000mA(USB heating), 9V 1500mA(external power cooling), 9V 1600mA(external power heating) Size: Approx. 15*15*5cm / 5.9*5.9*2in USB Cable Length: Approx. 1m / 39.4inch Weight: Approx. 450g Package List: 1 x USB Coaster 1 x USB Cable 1 x Manual Note: It only supports direct power supply from 5V 2A USB charger, if you need to connect it to external power supply, it needs power adapter(not included).