The B1-S is built around the Nordic Semiconductor nRF54L family of wireless SoCs. It combines a high‑performance 2.4GHz multiprotocol radio with an Arm Cortex‑M33 MCU running at 128MHz, plus a dedicated RISC‑V coprocessor. B1-S SOS button is large and easy to click. It supports button-triggering functions (single click / double click / triple click) and comes with an LED light. It can be used as an SOS button / remote control / emergency button, etc. The emergency button can trigger advertisements for connected mobile phones or trigger alarms, and is widely used in hospital emergency call systems, elderly care, homes, etc. B1-S Bluetooth SOS button is a BLE6.2 beacon with ultra-low power consumption. B1-S emergency button has a portable size and can be carried as an SOS button. Key Features Trigger advertisements or alerts for the connected apps Ultra-low power nRF54L series Support button triggered Wireless firmware update (OTA) Large buttons that are easy to click and easy to install Color: White Material: plastic Package Contents: 1*Emergency button Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.