The easy way to check your IR remote for proper operation. Simple operation : point the remote at the sensor and push an arbitrary button. Four flashing LEDs indicate remote operation.
Specifications:

1. low power consumption
2. power supply: 9V battery (not incl.)
3. dimensions: 55 x 30 x 33mm / 2.2 x 1.2 x 1.3"

manual_wsha137.pdf

module_diy_kit_guide.pdf