Features: brand new and high quality Adopting premium metal material, it is safe, sturdy and durable. With exquisite workmanship, it has smooth and comfortable hand feel. 5000mAh large capacity, let you rest assured to use. Also can be used as a cute mobile power bank for your mobile phone. Portable, suitable for using in classroom, office, library, tea house, home, etc. Instructions: Long press On/Off and for touch the switch for 2-3 seconds. The hand warmer starts to work. The working indicator lights up. Three sets of PTC (two sets for hands and one set for neck). Start heating. Initial default: the neckband position PTC is low-level, and the hand warmer is low-level (heating temperature is 45C). First short press On/Off, the hand warmer is high level (55). Second short press, turns off the heat on the front of the hand. And the third short press On/Off, for touch the switch to get hot on the back of the hand. Long press Off/Off, normal power-on state. for Touch the switch for 2-3 seconds, the hand warmer stops working; Short press N in power-on state. Touth the switch to change the neck positon heating level(two gears). Long press the N, for touch switch to change the neck position heater to start heating or stop heating. When it is turned on, you can blow into the small hole on the back of the heater to control the on/off of the display. Specification: Material: Metal Power Supply: USB Charging Output Current: 5V/2A Battery Capacity: 5000mAh Duration Time: about 2.5-5 hours Maximum Power: 8W Independent setting for warming hands and neck Auto power off after fully charging Can charge the phone directly Size: app. 126x72x33mm/4.96x2.83x1.30in Optional Color: Blue Pink, Deep Purple, Pink, Purple Quantity: 1 pc Note: Transition: 1cm=10mm=0.39inch No retail package. Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1 x Electric Hanging Neck Hand Warmer(other accessories demo in the picture is not included.)