Specification: Item Type: Massage Bra Material: Brushed Fabric Color: Black Voltage: 3.7V Battery: 1 x 650 mah Lithium Battery Powered by: USB Charging Upper Chest Circumference: Approx. 78cm / 30.7nch Lower Chest Circumference: Approx. 64cm / 25.2inch Weight: Approx. 342g Function: Dredge breast duct, Enhance the breast tissue, Relaxation breasts and breast deformation, Accelerate blood circulation, Relieve breast pain Using Method: Fix the bra to the breast and use it for 15-30 minutes a day, 1-3 times a day. The lithium battery "+" corresponds to the upper button of the bra, and "-" corresponds to the lower button of the bra, otherwise the power is not available. Package list: 1 x Massage Bra 1 x 650 mah Lithium Battery 1 x USB Cable Note: 1. In the process of use, goods such as quilts cannot be used to cover products to prevent local overheating. 2. Do not sleep while using. 3. If local red heat occurs after use, please stop observing for a few days. Do not use continuously. 4. Use with thin towel, no more than 30 minutes each time. Customers who are sensitive to temperature are advised to shorten each time, about 15 minutes. 5. Drink plenty of water before and after use to help with detoxification. 6. Direct plug use is prohibited. 7. Ban machine wash.