Our hand warmers' design is avocados. Cute avocados shape looks healing and eco-friendly, can be a nice winter gifts. Smooth touch and compact size will make you feel very comfortable to hold in hands or carry in pockets The handwarmers can work together or separately. When one side is , the other side can continue to warm. Comes with charging cables 2500mAh batteries, fully within 2 and provide about4-6hrs heat from each single sided electric hand warmer, keep your hands warm for a long walk in the cold Indicator light helps you clearly get remaining power and current setting. over-voltage, over-temperature, short-circuit protection Battery capacity/specification:2500mah Input 5v=1A TYPE-C interface:compatible with PD line charging and discharging Charging and discharging at the same time: not supported LED lights:3 warm white lights Temperature control :10KNTC temperature sensor, short circuit or open circuit will not generate heat Gear/temperature:1st gear:452; 2nd gear:502; 3rd gear:552 Protection device:overvoltage protection, overcharge protection, lithium battery protection Switch duration:Press and hold the switch for 2 seconds to start heating, short press to cycle from first to third gear Colour:Black Material:ABS+aluminum Package Contents: 1pair * hand warmer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.