Features: This is a multifunctional VFD spectrum display device with highly-precisions clock display function, Bluetooth-compatible5.0 receiver, and support for 3 Stereo source (2 AUXchannels, 1 Bluetooth-compatible5.0 channel) switches function. And equipped with a remotecontrols, the operatings is convenient and fast. Aluminum panel and acrylic, which is wearresistant and very fashionable and beautiful. The lightweight size is also convenient to place in any desktops position. A spectrum highresolutions green VFD display screen can display up to 25EQ frequencys, ensuring accuracy and aesthetics for each frequency bands. The highly-precisions clock chip RX8025T have a builtin temperature compensation function. And it is equipped with a highly-capacity Farads capacitors to replace traditional button batteries, eliminating the hassle of battery replacement. In the event of power outage, it can continue to run for at least 45 days until the next time , and it will automatically fully charge and reused. Supports 80Hz-16KHz frequency used for frequency point testing. Connect perfectly with your phone/PC/game player and other Stereo devices through Bluetooth-compatible5.0 and 3.5mm interfaces, easily check the music level status, and every subtle change in sounds visually displayed. Specifications: Material:Aluminum,Acrylic Color:Black,Silver Resolutioned: 25x15 Support frequency range: 80Hz-16KHz Display Item: Music Spectrum/Clock Stereo signal input: 1x Bluetooth-compatible5.0,2x 3.5mm Stereo output: 1x 3.5mm Size:Approx.184mm/3.54''x75mm/2.95''x66mm/2.59'' Package Includes: 1x Vacuum Fluorescent Display note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.