This is a genuine leather watch replacement band with smart chip in it for most 22mm or 20mm watches. It has similar function as smart bracelet. High cost effective watch strap you cannot miss.

Features:
Textured genuine leather strap, quite luxury.
Intelligent chip in strap, similar to a smart bracelet.
Compatible with watches who use 22mm or 20mm spring bar. 
0.42" OLED touch screen.
BT 4.0 technology, working distance is 8-10 meters.
Life water-proof for daily use.
30mAh battery, 7-10 days standby time.
Used with app, support ≥ IOS 9.0 and Android 4.3 devices.
Quick release and easy to install.

Functions:
1. Distance, Calorie, Step; 
2. Clock/Time Display;
3. Alarm Function;
4. Sedentary Reminder;
5. Sleep Monitor;
6. Remote Control Camera;
7. App Notifications;
8. Call & Message Remind;
9. Anti-Lost: Find my Phone;
10.App supports languages: English, Russian, German, French and Korean.

Specifications:
Material: Genuine Leather + Chip
Color: Black / Blue / Coffee (Optional)
Spring Bar Size: 22mm / 20mm (Optional)
Screen: 0.42" OLED
Strap Width: 2.2cm / 0.86in
Strap Length: 12.5cm + 7.5cm(4.9in + 2.9in)
Product Weight: 19g / 0.72oz
Package Size: 15 * 9 * 4.2cm 
Package Weight: 160g / 5.6oz

Package Included:
1 * Watch Strap
1 * Spring Bar Remover
1 * Charging Clip
1 * User Manual