User Guide

5
2.2 Hardware Overview
2.3 Dimensions (mm)
2.4 Power Button
EM400-UDL can be switched on/off via NFC. Besides, users can use power button to switch
on/off and reset the device manually.
Function
Action
LED Indication
Switch On
Press and hold the button for more than 3 seconds.
Off → On
Switch Off
Press and hold the button for more than 3 seconds.
On → Off
Reset
Press and hold the button for more than 10 seconds.
Quickly Blinks
Check
On/Off Status
Quickly press the power button.
Light On: Device is on
Light Off: Device is off
3. Operation Guide
3.1 NFC Configuration
EM400-UDL can be configured via NFC.