* Can keep the tempreture of tea or coffee t at 50-60℃

* Easy to install, driver not needed

* Voltage: 2. 5W-5V DC,

* LED red light

* USB supply power,   battery not needed

* 4 USB road HUB function, fast speed

* Dimension: 12. 3*9. 3*2. 3cm

* Weight: 135g

 * Color grey and black