Fully autonomous: the app connects to sensors and uploads data on its own
No risk of loss — the main block is fixed outside with Velcro or stored in a compartment pocket
Battery life: up to one month
No buttons — it can’t be forgotten or turned off accidentally
Data security. Encryption happens on the sensor, transfer via a protected channel
Quick reaction — the external sensor inside the bag captures changes with almost no delay
Reliable with zero extra steps