Ⅰ. Use it for: Instant Relaxation, Deeper Meditation, Improved Sleep, Imprinting Frequencies On To Objects Ⅱ. How to Use: Plug the device into a wall socket, laptop or power bank using the provided USB-C power cable. Connect some earphones to the device or connect the device to a speaker using an AUX cable. Type in the desired frequency using the touch pad on the device. Press Ok. Ⅲ. Specifications: Working voltage: DC 5V (DC 4-15V); Working current: 9-14MA; Power interface: Type-c (Support TYPE-C TO TYPE-C power supply); Default frequency: 7.83Hz; Adjustment range: 0.01Hz~30000Hz Pure Sine Wave; Signal voltage amplitude: 3V; With 3.5MM audio output; With acrylic shell; Size: 155*105*26MM (With shell); Weight: 300g (With shell) Ⅳ. Product List: 1pc * Healflux Custom Frequency Generator V2 (with acrylic shell), 1pc * USB cable