3 x 590mAh CR2450 lithium batteries
Battery life:
Approx. 5 years (Class A mode + 1 screen refresh per day)
Approx. 1 year (Class B mode + 12 screen refreshes per day)
Supports multiple symbols to display up to 150 languages
Provides API for management platform integration or development
Supports customisation of display templates
NFC enabled
IP30 protection
E-Ink display: 4.2-inch black and red E-Ink screen
Resolution: 400*300 pixels
DPI: 119
Viewing angle: 180°
Refresh rate: 16s (10°C ~ 40°C)
https://www.milesight.com/iot/product/iot-display/ds3604
