? Have 3 modle to monitor ur status: step movement modle:riding modle ;swimming modle? Big large colour screen Large capacity battery;15 days stand by，7 day working day? check your physical index， such as steps， distance， calories burned ，sleeping time and light sleep or deep sleep ，heart rate ，blood pressure，blood oxygen，anti-lost alarm? Remind the message from whatapp，facebook;1 year warrenty，can exchange new one for u or refund the money for u freely in the first yearTechnical ParameterBasic Specs Model No. St 13 Corol smart bracelet App OS Android 4.4 and above ，iOS 7.1 and above Main function steps pedometer，Calorie burnt，Distance Track， Sleep monitor， Call remind， Alarm remind， Anti-lost， Camera remote control， etc. Sensor Three-axls acceleration sensor CPU chip Nordic nRF52832 Vibration Green light static heart rate sensor Waterproof waterproof (Sweat proof，rain proof，water drop proof)Screen Size 0.96inch Type 80x160Connect Bluetooth 4.0 Other Specs Strap material TPE Dimension Host：40 x 20.0 x 12.5mmStrap：266 x 20 x 12.5mm Net weight 22g Color Black，Bule，Purple，red， Other Operation：Wrist senses， tap to switch Battery Li Battery Capacity 110mAh Standby time 5-7 days Charging USB charge Charging time About 1-1.5 hours





Bluetooth Version: Bluetooth 4.0
People: Male table，Female table，Unisex table


Case material: Alloy
Band material: Silicone


0.0770 Package weight: 0.098 kg
Product size (L x W x H): 9.00 x 7.00 x 5.00 cm / 3.54 x 2.76 x 1.97 inches
Package size (L x W x H): 10.00 x 8.00 x 6.00 cm / 3.94 x 3.15 x 2.36 inches


Package Contents: 1 x Bracelet