Ip68 grade water resistance and product main functions heart rate monitor, pedometer, multi-sport mileage, calories, sleeping monitor, stopwatch, hands raise light up, remote camera, sedentary reminder, find my device, alarm clock, take medicine reminder. Size 43. 5 x 10. 2/1. 71 x 0. 40(l x w x h) weight watch weight: 40g displayer lcd size 1. 3inch resolution: 240 x 240 ips tempered glass capacitive press colour screen lcd touch screen single touch battery 110mah vibration support attend bluetooth 4. 0. Hardware hs6620d ram/rom ram 64k rom 128+128mb heart rate hrs3300 bluetooth ble 4. 0 ios 9. 0 above android 4. 4 above software function apk app name: Dafit. Hands raise light up no disturb mode(22: 00-8: 00 from this time no have notification, hand raise light up will don't work) 24h 12h time choose mode meter and feet choose mode reset. Cautions 1. Prolonged contact may contribute to skin irritation or allergies in some users. If you notice any signs of skin redness, swelling, itchiness, or other skin irritation, please discontinue use or wear the product clipped over a piece of clothing. Continued use, even after symptoms subside, may result in renewed or increased irritation. If symptoms persist, consult your doctor. 2. This product is not a toy. Do not allow children or pets to play with your opta product. The product contains small components that can be a choking hazard. 3. The device contains electrical equipment that could cause injury if not handled properly. 4. This product is not a medical device, and is not intended to diagnose, treat, cure, or prevent any disease. 5. Consult your doctor before beginning or modifying any exercise program. Consult your doctor before use if you have any pre-existing conditions that might be affected by your use of this opta product. 6. Do not check call notifications or other data on the product's display while driving or in other situations where distractions could be hazardous.