DROK power supply module input voltage range is DC 5.3-32V; output voltage range is DC 1.2-32V, can be arbitrary adjustable; output current can be 8A for long term use, if enhance heat dissipation, it can reach 12A; max output power is 120W, if enhance dissipation, it can reach 160W. | LCD Display: the buck converter is designed with LCD, can display input and output voltage, output current and output power; voltage display resolution is 0.05V, current display resolution is 0.005A. | Safe Protection: the voltage regulator module is with reverse connection protection at input terminal, reverse connection will not burn; short circuit protection. | Application: the volt conversion board can be used as an ordinary buck module with over-current protection; used as a high-power LED constant current driver module; DIY a solar power controller, etc. | Button Control: button control output voltage ON / OFF status, and you can set the default output state is ON or OFF of the next time power-on.

【Compatible Systems】 This volume control knob supports Win10/8/7/Vista/XP/Mac, once you insert it to your computer, it can start to work. Please see the video to learn more. Open a blank txt file, then short press the knob and connect to the USB port. Enter the Windows/Mac mode to programme key combination for this controller. With OTG cable, it can also work for phone. | 【Simple Operation】 Rotating the usb volume knob to turn up and down volume, press the knob to make it mute, press down the knob and turning to adjust volume more quickly; keep pressing the knob for 8s, it will enter night mode, breathing light will stay on. | 【Strong Construction】 DROK USB volume control is made of metal shell and ALPS rotary shaft, equipped with breathing light and come with USB cable. With 1 key mute function, when you are listening to music, just press the knob, it will stop at once and back to music when you press again. | 【2 Sizes】2 Sizes to fit different needs. The small DROK volume control knob is light and portable. Choose the bigger one if you prefer more substantial feeling with heavier weight. | 【Wide Applications】A great volume control tool for watching videos, playing games, even will be the best volume controller for activities, wedding, meeting, celebration and so on.

【Compatible Systems】 This volume control knob supports Win10/8/7/Vista/XP/Mac, once you insert it to your computer, it can start to work. Please see the video to learn more. Open a blank txt file, then short press the knob and connect to the USB port. Enter the Windows/Mac mode to programme key combination for this controller. With OTG cable, it can also work for phone. | 【Simple Operation】 Rotating the usb volume knob to turn up and down volume, press the knob to make it mute, press down the knob and turning to adjust volume more quickly; keep pressing the knob for 8s, it will enter night mode, breathing light will stay on. | 【Strong Construction】 DROK USB volume control is made of metal shell and ALPS rotary shaft, equipped with breathing light and come with USB cable. With 1 key mute function, when you are listening to music, just press the knob, it will stop at once and back to music when you press again. | 【2 Sizes】2 Sizes to fit different needs. The small DROK volume control knob is light and portable. Choose the bigger one if you prefer more substantial feeling with heavier weight. | 【Wide Applications】A great volume control tool for watching videos, playing games, even will be the best volume controller for activities, wedding, meeting, celebration and so on.

【Compatible Systems】 This volume control knob supports Win10/8/7/Vista/XP/Mac, once you insert it to your computer, it can start to work. Please see the video to learn more. Open a blank txt file, then short press the knob and connect to the USB port. Enter the Windows/Mac mode to programme key combination for this controller. With OTG cable, it can also work for phone. | 【Simple Operation】 Rotating the usb volume knob to turn up and down volume, press the knob to make it mute, press down the knob and turning to adjust volume more quickly; keep pressing the knob for 8s, it will enter night mode, breathing light will stay on. | 【Strong Construction】 DROK USB volume control is made of metal shell and ALPS rotary shaft, equipped with breathing light and come with USB cable. With 1 key mute function, when you are listening to music, just press the knob, it will stop at once and back to music when you press again. | 【2 Sizes】2 Sizes to fit different needs. The small DROK volume control knob is light and portable. Choose the bigger one if you prefer more substantial feeling with heavier weight. | 【Wide Applications】A great volume control tool for watching videos, playing games, even will be the best volume controller for activities, wedding, meeting, celebration and so on.

【Programmable for PC】 Please see the video to learn more. Open a blank txt file, then short press the knob and connect to the USB port. Enter the Windows/Mac mode to programme key combination for this controller. | Strong Construction: the USB volume control is made of metal shell and ALPS rotary shaft, equipped with breathing light and come with USB cable. With 1 key mute function, when you are listening to music, just press the knob, it will stop at once and back to music when you press again. | This volume control knob supports Win10/8/7/Vista/XP/Mac, once you insert it to your computer, it can start to work; with OTG cable, it can also work for phone.(Note: some phones can't work, for replacing Android native sound control program , such as Samsung.) | A great volume control tool for watching videos, playing games, even will be the best volume controller for activities, wedding, meeting, celebration and so on. | Simple Operation: rotating the usb volume knob to turn up and down volume, press the knob to make it mute, press down the knob and turning to adjust volume more quickly; keep pressing the knob for 8s, it will enter night mode, breathing light will stay on.