Product Name: Wave Generator/Ultra Low Frequency Generator Mainboard power supply: DC 15V 2A MAX output power: 15W, adjustable output power. Adapter power supply parameters: AC 100-240V 50HZ Output frequency: 6.8HZ/7.83HZ/8.3HZ Three selectable output waveforms: sine wave wave itself is not directly acting on the sound or video products to improve the quality of sound quality, but the role of the space environment, people's physical and mental relaxation, improve the body's perception of sound and images, improve the health of the human body to improve the efficiency of work, mental stress also have a better effect. Note: Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need. Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Voltage: AC100-240V Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the , the Philippines,Taiwan and so on. Colour:Photo Color Material:plastic Package Contents: 1 x Schuman Generator Only the above package content, other products are not included. Note: Light reflection 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.