Designed with screw terminals for convenient wire connection | This controller is used for emergency battery switching; when there is power on main power source terminal, it will connect to main power source as power supply; otherwise, it will automatically switch to battery | When the power on main power source is back, it will switch to main power | Widely used for controlling power supply of incubator, laptop, network | Convenient to use, it will automatically identify voltage between 12V and 48V DC

【Fitment】The bluetooth aux module is fit for universal cars, widely applicable, rest assured to use, add bluetooth function to your car | 【High Quality】The aux‑in cable adapter is made of high‑quality ABS material, which have high reliability, anti-corrosion, wear resistance, sturdy, not easy cracked, can be used for a long time | 【Brand New】100% brand new high quality audio music adapter,strictly full tested to ensure the best quality before shipment, safe to use | 【Easy Installation】Simply plug the 2RCA connector into the socket on the back of the radio, then connect the red wire to 12V+ and the black wire to 12V‑ | 【Service Guarantee】Please feel free to contact us if you have any questions after received our products, we will try our best to solve your problem.

【Multiple computer sharing】Print server can share multiple computers, is compatible with more than 1500 kinds of printers, and supports automatic configuration of computer IP and server IP without manual input of IP.Support OTA online upgrade firmware. Let ordinary LPT, USB printer support network printing function. | 【Strong compatibility】 USB printer supports most types of lasers, inkjet, needle and other types of printers on the market, and is constantly increasing. Full support for Windows XP/7/8/10/Vista, OS X and other common systems. | 【Ultra-low power consumption】USB print server supports compatibility diagnostics, enabling incompatible printers to be quickly supported. | 【Support for queues】Ethernet print server support for automatic queue printing without software. | 【Hi-Speed USB 2.0】 USB 2.0 provides a 480 Mbps transfer rate.

【Easy to Install】This car roof antenna is easy to install and remove, directly replacement for the old or damaged one, no modification is required, perfectly match to your car. | 【High Quality】The car antenna is made of high quality ABS material, which has high reliability, sturdy, anti-corrosion, anti-rust, wear resistant, durable in use. | 【Fitment】The 3897ZIY fin antenna is widely fit for A3 2016-2018. It has fashion design, make your car more attractive. | 【Brand New】100% brand new high quality car shark fin antenna, original standard, strictly full tested to ensure the best quality before shipment, safe to use. | 【Service Guarantee】Please feel free to contact us if you have any questions after received our products, we will try our best to solve your problem.