Barter is the present and the future of international trade, especially for people who is starting in the import export business. Barter and more: Triangular operations.
The B8 wristband is a social distancing Bluetooth® beacon with distance ranging, precisely sensing when other wearers come within 2-meter and alerting the user with visual red light and vibration. B8 wristband can store more than 20,000 data records.
