One way adjustable signal generator output. Convenient to provide the pulse signal
With a logical pen function. For convenient the logic level of test circuit
With a one way buzzer. You can test the wires on and off (connect the wires to the power positive and signal input, the wire on – the buzzer sound). You can also test the low-frequency signal (input the signal from the signal input, if there is a signal, the buzzer sound)

Specifications:

Power: 2W
Voltage: 220V (update in 2015-03-11)
Plug: EU plug
Output voltage: 1.25V – 12V regulated output continuously adjustable.
PCB board size: 7.3 x 6.8cm (W / L)
Shell Size: 11 X 6.9 X 41.5cm (L / W / H)
Weight: about 295g