Microwear Smart Watch model no 9This product is not a medical device. The health data and suggestions provided are for reference only, not as a basis for diagnosis and treatment. This product has a built in rechargeable lithium battery. Safety warnings for battery use: do not disassemble, strike, sque ze or put into fire; if it is severely swollen, do not continue to use it; do not place it in a high temperature environment; do not use the battery after it is immersed in water.