EU 220V DIY LM317 Adjustable Voltage Power Supply Board Learning Kit With Case<br>Features:<br>One way adjustable signal generator output. Convenient to provide the pulse signalWith a logical pen function. For convenient the logic level of test circuitWith 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)<br>Specifications:<br>Power: 2WVoltage: 220VPlug: EU plugOutput 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<br>Package included:<br>1 x DIY LM317 Kit