Use it for: Relaxation, Meditation, Sleep Support How to Use: – Plug the device into a wall socket, laptop, or power bank using the included USB-C power cable. – Connect headphones 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: 7.83 Hz Adjustment range: 0.01 Hz to 30,000 Hz Output waveform: Pure sine wave Signal voltage amplitude: 3 V Audio output: 3.5 mm jack Enclosure material: Acrylic Dimensions: 155 × 105 × 26 mm (with enclosure) Weight: 300 g (with enclosure) Package Includes: 1 × Frequency Generator (with acrylic enclosure) Note: Color appearance may vary slightly due to lighting and screen settings. Slight dimensional variations may occur due to manual measurement.