Tovmekdjn Features: 1. This product is .83HZ very low frequency generator, features high accuracy and stability. 2. High stable frequency acquisition elements: high stability pulse chip, correction capacitance, multi-loop adjustable resistor, display solid capacitance. 3. New optimized circuit design, gold-plated circuit. 4. wave can be applied to HIFI or sleep. 5. For audio-visual space - to enhance the sound field and audio-visual effects,For the bedroom - to help sleep soothe the nerves, adjust insomnia, For office - to relax and improve work efficiency, Used to create space - to improve inspiration,For the tea ceremony - resting body and mind It is normal for each person to experience different results Color: Blue Material: plastic Package Contents: 1 x Mainframe(The product is not equipped with power supply by default, you need to use 12V500MA above the power supply) 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.Suitable for improving inspiration when thinking. Product size is compact and easy to carry. Stimulates the brain into deep sleep. Suitable for stabilizing the mind while meditating. Consolidate your memory while you sleep.