Sandwich type structure heat insulation design,heat preservation and heating core core fire treatment,safety . ^Made of crystal velvet heating material,heats quickly and evenly. ^Zipper opening design,removable wash liner and cloth cover (heating sheet should not be washed,cloth cover can be washed),cleaner and more sanitary. ^This baby bottle warmer and heater warms quickly and evenly,it can stretch to fit most baby feeding bottles,it is easy and safe to use. ^Fully compatible with a variety of power supplies,the power cord is USB interface,compatible with most 5V2A mobile power,most 5V2A charging head,most 5V2A car charger (power must be more than 1. 5A to drive the heating film,it is recommended to match 2A charging head Or charging treasure). ^