COMPACT & CONVENIENT: A compact and sleek hand warmer design that will fit conveniently in any pocket to improve comfort in the outdoors during cold conditions FAST HEATING WITH 4 LEVELS: Will heat up in 10 seconds and provides 3 to 6 hours of all-round heat, available through 4 heat levels that are clearly indicated via small LED lights POWER BANK FUNCTIONALITY: The unit can also be used to charge mobile phones and other devices to give a power boost when you are out and about. Instructions for this function: Ensure the hand warmer is switched off. Plug mobile device into the hand warmer. Lights will display the level of charge remaining EASY & FAST TO RECHARGE: Mains or USB rechargeable using USB cable which is included, with a charge time from low to full in approximately 4 hours CHARGING THE HAND WARMER: Ensure the hand warmer is switched off / Plug into any USB port/charger using cable supplied / Charge until all four lights are illuminated OPERATING THE HAND WARMER: Press & hold ON/OFF button for 4 secs. to turn ON. Press ON/OFF button again to select heat setting. Press & hold ON/OFF button for 4 secs. to turn OFF DIMENSIONS: 58 x 104 x 28 mm WEIGHT: 141g. CE certified ROSH compliant recyclable