Describe net weight:12pcs Shelf life:3 years Product functions and features are: 1. Multi-functional massage: The handheld massager can massage muscles in different parts, such as neck, shoulders, waist, etc., to effectively relieve fatigue and stiffness. 2. Adjustable massage intensity: Some handheld massagers are equipped with massage intensity adjustment functions at different levels, so you can choose the appropriate intensity according to personal needs. 3. Easy to carry: The handheld massager is small in size and easy to carry. It can be used for massage anytime and anywhere, such as in the office, at home or on the road. 4. Efficient relaxation: The vibration or rotating massage head of the massager can quickly promote blood circulation, relieve muscle soreness and tension, and help relax the body and mind. 5. Comfortable experience: Handheld massagers are usually designed with ergonomic handles, which are comfortable to hold and easy to operate, allowing users to enjoy a comfortable massage experience. Instructions: Before use, make sure the handheld massager is charged or has batteries installed. Choose the appropriate massage head according to your needs, such as silicone massage head, spherical massage head, etc. Turn on the handheld massager and select the massage gear and intensity according to your personal preference. Place the hand-held massager on the area that needs massage, apply appropriate force, and start massaging. When massaging, you should be careful not to use excessive force to avoid muscle damage. The massage time is generally controlled to about 15-20 minutes.