Use it for: 1. Relaxation 2. Meditation 3. Sleep How to Use: – Plug the device into a wall socket, laptop, or power bank using the provided USB-C power cable. – Connect earphones to the device or connect the device to a speaker using an AUX cable. – Enter the desired frequency using the touch pad on the device. – Press “Ok”. Specifications: Working voltage: DC 5V (DC 4–15V) Working current: 9–14mA Power interface: USB-C (supports USB-C to USB-C power supply) Default frequency: 7.83Hz Adjustment range: 0.01Hz–30000Hz Signal type: Pure sine wave Signal voltage amplitude: 3V Audio output: 3.5mm jack Housing material: Acrylic Dimensions: 155 × 105 × 26 mm (with housing) Weight: 300 g (with housing) Package Includes: 1 × Frequency Generator (with acrylic housing) 1 × USB cable Note: Due to differences in lighting and screen settings, the item’s color may vary slightly from the images. Slight dimensional variations may occur due to manual measurement.