The product can trigger any voltage that follows the PD2.0 standard, and can be used for load testing via USB or cable. After being electrified, ZY12PDS enters PD mode(default). If indicator turns red stably, it means 5V(default) has been set up. You can tap the on-off button to switch the output voltage. The indicator flickers red under following situations: the adapter does not support PD mode, connection timeout or no respond to the request. Specifications: Voltage: 3-20V Current: 0-5A Colour:Blue Material:electronic Materials Size:5 x 3 x 1cm Package Contents: 3 x Module Note: The product is only for the Do not connect with any devices that can't support high voltage after triggering PD. Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.