4 Level Vibration Mode-Enhance your Pre-workout and Recovery system with Foam roller Low/Medium/High/Pulsating Vibration Modes at your choice.perfect for warming up,circulation improvement and recovery of sore and tight muscles Rechargeable&Ultra-Portable-With only 3.9inch diameter and 0.79lbs,light-weight and compact therapy ball is so portable that you can bring to anywhere you like for relaxation,best comp for your camping trip,training,yoga or fitness Washable-All Surrounded by silicone,the waterproof grade is IP65,you can wash the massage ball directly,but don't left in water for a long time Pain Reduction-Massage ball gives you access to hard to reach pain points and provides relief,Trigger Point Therapy and relaxation,It works to massage and relieve your back,hips,legs,arms,waist,and feet Charging time:about 4 hours Motor operating temperature:65 ° C Colour:Black Material:ABS+silicone Package Contents: 1* Electric Massage Ball 1* USB line 1* Instruction manual Only the above package content, other products are not included. Note: Light shooting 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.   Electric Massage Ball