SKU: OT3261 Article number: AA638 EAN: 8720589817999
This Optocoupler board is equipped with 2 PC817X optocouplers. For an explanation of how optocouplers work exactly, we recommend watching the video included with this product (English).
The jumper connects the minus/GND planes for a Common Ground. To achieve full isolation, the jumper should be removed.

Input voltage (IN1-IN2): 3.6-24V
Output voltage (V1-V2): 3.6-30V
Maximum power per output: 150mW
Maximum switching frequency: 4kHz
Download the datasheet for the PC817X optocoupler here
Dimensions
Length: 3.78cm
Width: 2.82cm
Height: 1.2cm