Stereo audio amplifier boosts sound 50 times. Great for the hearing impaired (e.g. when watching TV), as a gadget, science project, … With volume control and on/off switch.
Specifications:

1. power supply: 3 x 1.5V AA batteries (not incl.)
2. dimensions: 62 x 54 x 44mm / 2.4 x 2.1 x 1.7"

manual_wsah136.pdf

module_diy_kit_guide.pdf