1. Body temperature measurement: Automatic body temperature measurement throughout the day, when the temperature is measured> 37.3 ℃, the bracelet will automatically alarm to remind. 2. Time / Date / 3. Vibration alarm can set two groups of alarms 4. Chronograph 5. Rechargeable lithium polymer battery, fully charged for 30 days Note: The above functions support single watch replacement, without binding mobile phone or computer software Specifications: Measurement accuracy: ± 0.1 ℃ (measured under the liquid pocket) Measuring range: 30 ~ 45 ℃ Prompt method: vibration motor Display screen: LED light display Waterproof level: IPX57 Charging voltage: DC = 5V (built-in usb can be plugged into the charging treasure to charge) Product material: strap environmental protection silicone + shell ABS Battery capacity: 55mAh 3.7V Product weight: 17g Operating environment: -10 ~ 50 ° C Product size: 240X16X8mm (length X width X height)   Specifications: Net weight of the product: 17g (net weight of the product, without packaging) Package weight: 48g (including Chinese / English neutral instructions, including product weight) Product packaging: length 110 × width 90mm × height 26 (PET blister neutral packaging) Package Included: 1*V9 watch 1* Chinese / English manual