electric heating bag 1.become warm at once. 2. as gifts 3. ... usd:4/pcs 4.,convenient, lovely,suitable for promotion electric heating bag 1.CE,FDA,MSDS,EN71/Part3 ,ISO13485 etc. 2 ... hundred times by following the instruction 3) Can be used outdoor for physiotherapy 4) Especially effective on muscle aching, back aching ...