1. Body temperature measurement: Automatic body temperature monitoring throughout the day. When the temperature exceeds 37.3C, the bracelet will vibrate to alert. 2. Time and date display 3. Vibration alarm with support for two customizable alarm groups 4. Chronograph function 5. Rechargeable lithium polymer battery provides up to 30 days of operation on a full charge Functions can be used independently without connecting to a mobile phone or computer software. Specifications: Measurement accuracy: 0.1C (measured under liquid pocket conditions) Measuring range: 30C to 45C Alert method: Vibration motor Display: LED light display Water resistance level: IPX57 Charging voltage: DC 5V (built-in USB allows direct connection to power bank for charging) Product materials: Environmentally friendly silicone strap and ABS shell Battery capacity: 55mAh, 3.7V Product weight: 17g Operating environment: -10C to 50C Product dimensions: 240 x 16 x 8mm (L x W x H) Net weight: 17g (product only, without packaging) Package weight: 48g (including product, Chinese/English manual) Packaging dimensions: 110 x 90 x 26mm (PET blister packaging) Package Included: 1 x V9 Watch 1 x Chinese/English User Manual