smart electric neck and shoulder massager low frequency magnetic therapy pulse pain relief tool health care relaxation

model number : d045 material : cotton, abs application : neck item type : massage & relaxation product type: : massage and relaxation materials: : abs and tpr model: : neck massage application: : neck charging method: : usb voltage parameters: : dc5v; 1a; 5w built-in lithium battery capacity: : 1600mah function 1: : constant temperature massage function 2: : relax muscles and bones function 3: : promote blood circulation function 4: : relieve cervical pain function 5: :