▶Magnetic Fluid Sound opens up a new chapter of music visualisation. Depending on the music rhythm, the different speed and shape changes shown by magnetic liquid provide people with visual pleasure, This product is not a speaker, it cannot emit sound by itself, nor can it connect to Bluetooth, it needs to be used with a speaker ▶The unique magnetic liquid keeps the rhythm under the warm white light. According to the music played by the user with different rhythms, the magnetic liquid shows different speed and shape changes, which gives people visual pleasure. ▶As a music mate for your speakers, a desktop creative gift, a ferrofluid display or a stress-relieving toy, this product will impress. Place it on your piano surface as a metronome or take it with you on outdoor activities. It's also an excellent Christmas gift for someone who loves music and design. ▶The back of the speaker there are three touch switches, namely the power switch, the light switch and the magnetic liquid jump switch, which is sensitive to operation. The Type-C interface is connected to the power supply and the appearance is very artistic. ▶Built-in lithium-ion battery, long lasting working time allows you to enjoy up to 8 hours of play time long enough for any outdoor activities.