Features1Hot Cold Compress: You can choose cold compress or hot compress when massaging according to your own needs to make the effect of massage better. 23 Massage Gears: Fascia muscle massager with 3 gears for you to choose, providing 2800?3200 RPM, suitable for relaxing muscles after exercise, or daily soothing massage. 3Low Noise: The noise decibel of fascia massager is controlled within 45 decibels, whether it's a gym, home and office, you can enjoy muscle relaxation, also suitable for you work overtime at night. 4Multifunction: Hot compress to dilate blood vessels, improve local body circulation, promote local metabolism and relieve muscle fatigue. Cold compress for quickly relieve training muscle soreness, help speed up recovery. 515 Minutes Intelligent Shutdown: In order to avoid massaging the same part for too long to damage muscle and bone, fascia massager with intelligent timing protection, after 15 minutes of continuous use will automatically stop to ensure human health.SpecificationItem Type: Muscle MassagerMaterial: ABS Length: Approx. 15.1cm / 5.94inWidth: Approx. 15.6cm / 6.14inHost Diameter: Approx. 5cm / 1.97inHot Cold Head Diameter: Approx. 5.9cm / 2.32inBattery: Lithium Battery (Included) Battery Model: 18650Battery Capacity: 2400mAh Applicable Charging Head: 5V2A Charging Time: About 4.5-5 hours Impact Stroke: 8MM Power: 25W-35W Motor Load Speed: 2800-3200 RPM Temperature Range: 10-50 (5) Working Hours: Knocking 2-3 hours, 3 gears: slow, medium and fast Cold compress 2-3 hours, 3 levels: 10, 15, 20 (plus or minus 5 varies with the ambient temperature) hot compress 3-4 hours, 3 levels: 35, 40, 45 (plus or minus 5 varies with the ambient temperature)Massage Head: 5pcs (cold and hot compress head, ball shaped head, flat shaped head, U shaped head, cylindrical shaped head)Ball shaped head: soft, suitable for most muscles of the body to relax.Flat shaped head: simulation of empty hand palm beating muscles, for most of the body muscle relaxation.Cylinder shaped head: Suitable for impacting deep tissues such as meridians, palms and plantarU shaped head: massage the muscles on both sides of the spine and the trapezius muscle of the shoulder, suitable for sitting and standing for a long time people.Package List1 x Muscle Massage Gun(Including hot and cold head) 1 x Ball Shaped Head 1 x Flat Shaped Head 1 x Cylinder Shaped Head 1 x U Shaped Head 2 x Gasket 1 x Charging Cable 1 x Storage Box 1 x English Instruction