A regulated power source, signal generator & audio amplifier with in-built speaker in one unit.
The IEC "Tri-Mode" Signal Generator is really 3 instruments in one so that many electronic experiments can be performed without need of extra equipment.

The Tri-Mode provides the user with:

1) A metered and regulated +/- 1.2-20V.DC power supply at 250mA output.
2) An excellent high power Signal Generator from 0.1 to 100kHz.
3) An audio amplifier with high and low sensitivity inputs, oscilloscope output and internal speaker.

The signal generator has a specification similar to LB3754-001 with the same waveforms and the same high power output of 0.5A. This instrument is excellent value for money.
Information Sheet available.