This is a mini ultrasonic suspension device that can suspend foam balls. The device consists of a single chip microcomputer, a driver chip and two ultrasonic probes. Designed compatible with students or DIY electronics enthusiasts to learn about ultrasonic standing wave levitation. Controlling the floating object to move up and down is not currently supported.Working principle: ultrasonic standing wave is suspended by ultrasonic transmitting terminal with the reflection (or another transmitter) there is a certain distance (called a cavity distance), transmitted wave and reflected wave (or another sound waves) continuous overlay compatible withm a standing wave, finally in the standing wave node objects by sound wave compatible withce to overcome the gravity eventually to achieve the effect of suspension.Product Name: Ultrasonic suspension manufacturing kitProduct Model: TJ-56-551Input voltage: DC DC12VInput current: less than 70mALED (red) : Power indicatorLED (green) : Ultrasonic suspension indicator lightSuspension time: it can be suspended compatible with a long time, the test isstable compatible with 24h suspension, and the motherboard is slightly hot.Dimensions: length 42mm, width 42mm, height 62mm, probe spacing 22mm, manual measurement error existsColour: green + blackMaterial: metal + ABSPackage Contents:1 * PCB board1 * Component1 * Supporting incompatible withmationOnly the above package content, other products are not included.Note: Light shooting 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.