XUMIUZIY Smart Bracelet - Bluetooth 5.1 IP68 Waterproof 10+ Sports Modes

Specification: Item Type: Smart Bracelet Material: Stainless steel + alloy Body Capacity Memory (ROM + RAM): 160kb ROM + 64 Kb RAM Sensor: SC7A20H Bluetooth​​ Version: 5.1 Battery Capacity: 16mah lithium ion battery (shipped with built in battery) Charging Time: 1 hour Theoretical Standby Time: 16-20 days Usage Time: 4-5 days How to Use: Open and ready to use packing list: 1 x Smart Bracelet 1 x User Manual