Frequency Divider - The function of the frequency divider is to separate the mixed analog audio signals into high, medium and low parts, and then send them to the corresponding high, medium and low woofer units to play. thus achieving the purpose of improving sound quality. | Professional - This is a three-way KTV for tweeter + mediant + bass, a professional stage speaker crossover and a DIY upgrade tool designed to improve audio quality. High quality capacitors - low loss and high quality, eliminating the problem of electrolytic capacitors. | High quality materials - high temperature resistant wire, wire wound ceramic resistor and imported metal film. Overcurrent protection design, simple and beautiful lines, reasonable component layout. Small switch can adjust the treble (usually 3 dB can be added). | Ensure large power handling, long life and very good sound quality. If you have any questions, please contact us, we will do our best to serve you. | 2PCS Speaker Frequency Divider Crossover 3-Way 300W HiFi Audio Speaker Heights Mid Bass 3-Units Crossover Filter for 3-5 Inch Speakers

【High Performance Floppy Disk Reader】Compatible with USB1.1/USB2.0 interface, fast data read and write speed. | 【Wide Compatibility】The 3.5" USB floppy drive is compatible with Windows98/ SE /ME / 2000 / XP / Vista/Win 7/Win 8 /Win10,macOS,Linux OS. Suitable for Notebook, Desktop,and industrial machines. | 【Portable USB Floppy Drive】Fits 1.44MB 2HD floppies, can read and write 1.44MB or 720KB disks. | 【Plug And Play】No extra driver required, just directly plug it into USB connector, Floppy Disk Reader will be recognized by your computer and install driver automatically. | 【USB Floppy Drive 3.5-Inch External】The drive gets its power back from the USB port, so no external power supply is required. Provides a complete mobile computing environment for travel or out-of-plug situations.Extremely small shape design greatly increases mobility and reduces space requirements.