It fits most vehicles dash panel and rocker switch panel. '. +' to positive pole, '-' to negative pole. A tight fitting cap protects the USB ports when not in use. Also, it can be wired on an on/off switch to save energy.
eBay
USB Switch Extension Cable Power Supply Button ON/OFF Control Cable USB Male to USB Female Adapter Cable For LED Lamp USB Device
Aliexpress UK
Provides 7 USB ports. USB3.0 model HUB contains 1 usb3.0+6 usb2.0. Colour: Black. Equipped with 7 USB connectors, with hot-swappable function. Adopt high quality electronic devices to ensure stable operation;.
eBay
USB 2.0 HUB USB 3.0 Power Adapter Multi USB Ports Power Adapter Expander USB Multi Port Splitter With Switch For Laptop Computer
Aliexpress UK
Convenient Inline On/Off Switch. • Switch Type: Inline On/Off Toggle. •1 × USB-A Male to Female Extension Cable with Inline On/Off Switch. • Reinforced strain relief ensures a longer service life. • Connector Type: USB-A Male to USB-A Female.
eBay
USB 2.0 Hub USB Hub 2.0 Multi USB Splitter Hub Use Power Adapter 4/7 Port Multiple Expander 2.0 USB Hub with Switch for PC
Aliexpress UK
4 Ports USB 2.0 Switch for 2 PCs, 2 in 4 Out USB Switch for Mouse, Keyboard, Scanner, Printer, Stick, Hard Drive Compatible with Windows, Mac OS 8.6 and above, 2 USB 2.0 Cables. - 2 in 4 Out USB Switch for Mouse, Keyboard, Scanner, Printer, Stick, Hard Drive.
eBay
2 PCS USB Cable With Switch ON/OFF Cable Extension Toggle for USB Lamp USB Fan Power Supply Line Durable Adapter USB Headset LED
Aliexpress UK
Suitable for AA alkaline batteries.
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HD USB-C KVM Switch, USB-C KVM Docking Station Kit with 4K@60Hz or 4K@30Hz HD, 100W PD Charging, 5Gbps USB-A USB-C Data Port
Aliexpress UK
Plug & Play USB 3.0 Splitter: This powered USB hub is hot swappable, On/Off switch with led indicator for each USB port, no drivers required, the blue LED indicator flickering when there is data transferring.
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USB 2.0 Hub USB Hub 2.0 Multi USB Splitter Hub Use Power Adapter 4/7 Port Multiple Expander USB 3.0 Hub with Switch 30CM Cable
Aliexpress UK
2Pcs USB cable. Model Number: USB Cable Male to Female with Switch. Interface A: USB female. Interface B: male USB. Type: USB cable. Due to the light and screen difference, the item's color may be slightly different from the pictures.
eBay
USB 2.0 Hub USB Hub 2.0 Multi USB Splitter Hub Use Power Adapter 4/7 Port Multiple Expander 2.0 USB Hub with Switch for PC
Aliexpress UK
Cable Length: 30CM. Expand your device connectivity effortlessly with thisUSB 3.0 7-Port Hub. USB 3.0 Power Adapter 7-Port Multi USB Hub. High-Speed Data Transfer • Individual Switches • Compact Docking Station.
eBay
UGREEN USB Ethernet Adapter USB 3.0 Network Card to USB RJ45 Lan for PC Windows 10 Xiaomi Mi Box 3/S Nintend Switch Ethernet USB
Aliexpress UK