XIAOMI | Redmi Watch 3 Black | BHR6851GLDimensions 20 x 3. 66 x 1 cm Special features Activity Tracker Shelly BLU Button 1 Red is a Bluetooth operated action and scenes activation button with a sound and light alert,broad range and multi click trigger. Shelly BLU Button 1 helps you turn off the lights, adjust your blinds,lock your front door,etc with long battery life that works with your Shelly Plus and Pro devices. HIGH PROTECTION With support for the Advanced Encryption Standard, we have