Product Description1. Not a Bluetooth speaker and does not have a speaker to emit sound2. No need to connect to any line (wired/wireless), simply turn it on and the magnetizing fluid in the glass container will move with the rhythm of external sound or music3. Bubbles are necessary to balance the pressure within the glass container and will naturally settle and disappear over time. Bubbles in black/yellow colors are normal and will cover the top when placed upright4. The fluid may stick to the container wall due to the Nano-level iron powder material and the container's surface not being 100% smooth. Using the included magnet will activate the fluid and a stronger magnet can be used if needed5. Placing the product closer to the sound source will enhance the fluid movement effect. Each product will have a unique movement based on the sound it picks up, allowing for a fresh experience each time6. Temperature range for use is between 0°C-60°C. It is not recommended to use in a high-temperature environment, especially in a car during summer7. The magnetizing fluid is made with harmless materials including nano iron powder, mineral oil, and saline/pure water.SpecificationMaterial: ABS imitation bamboo grain/wood grain shell/high transparent glass bottle/magnetic fluidName: magnetic fluid pickup ornamentsPower: 10WColor: yellow Power input: 5V-2ALiquid tank capacity: 100MLBattery capacity: 4000mAhProduct size: 172*106*54mmCharging time: 8 hoursPackage weight: 855gEndurance time: 8 hoursProduct weight: 730gPlace of origin: ChinaProduct List1*Magnetic Fluid Speaker Music Mate