Overview: Head massager helps to improve your sleeping situation. Great for one who always suffer from insomnia. Best gift for your families, friends and yourself. The massager is mainly used for head but can be also used for any part of body including arm, neck, leg, waist, thigh, soothes tired and aching head, shoulder, and other related muscle groups. Features: - Comfortable and safety design. Four massager heads simulate finger massage to relieve stress and improve blood circulation - Easy to clean and waterproof. Four soft massage heads are removable. Easy and convenient to clean - Portable and easy to use. Simply charge and enjoy many hours of use wherever you are - It helps relieve tension and promote a good sleep Specifications: Model: M2 Material: ABS, soft silicone Waterproof level: IPX7 Working temperature: -5 - 40 Deg.C Battery: 1200mAh lithium-ion battery (built-in) Massage cycle: 10min Note: We recommend that you do not immerse the electric massager in the water. Product weight:0.4050 kg Product size:14.00 x 11.00 x 11.00 cm / 5.51 x 4.33 x 4.33 inches ​Package weight:0.6500 kg Package size:12.30 x 12.30 x 15.80 cm / 4.84 x 4.84 x 6.22 inches Package Contents: 1 x Massager 1 x USB Cable 1 x User manual