HAND WARMER + POWER BANK. This rechargeable hand warmer can be used both to warm your hands and to charge USB-compatible devices. It is easy to use and switches on at the press of a button. Features – Charges USB-compatible devices: mobile phones, MP3 players, tablets, cameras and more. The device warms up on both sides to a temperature of up to 50°C, with a choice of 3 heat settings. The rechargeable 4400 mAh Li-Ion battery provides up to 6 hours of warmth. Technical specifications – USB output: 5 V 2 A USB, USB input: 5 V 2 A Micro USB, Height: 10.8 cm, Width: 4.39 cm, Depth: 2.41 cm, Weight: 142 g, Warranty: 1 year