This is USB Radiation-proof Warm Bamboo Charcoal Wrist Mat White. It is radiation-proof and promote blood circulation of hand. Carbon fiber heat to protect your hand in winter. You will feel warm after connecting power supply 3 second. Try it and you will love it!                                    Features            New and high quality￡? never usedUSB interface￡? plug and playIt is radiation-proof and promote blood circulation of handCarbon fiber heat to protect your hand in winterYou will feel warm after connecting power supply 3 secondA necessary wrist mat for any computer userVoltage: 2-5VTemperature: 40-60/li!#!gt!*!Material: PP cotton￡? bamboo-charcoalSize: 7.7" x 2.4" x 1.0"Cable length: 50"Color: White                                                                                                Package Includes            1 x USB Radiation-proof Warm Bamboo Charcoal Wrist Mat White<br>