USB Mini Hub with Power Switch - OTG Micro-USB : ID 2991 : $5.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Cheap External 2 Port Usb Splitter Usb Hub Micro Usb Power Port Multi-Port Adapter | Joom
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Plugable USB-C 7-in-1 Hub – Plugable Technologies
Amazon.com: 3 in 1 USB OTG Cable Adapter,3 in 1 Micro USB HUB Adaptor with Power 3-Port Charging OTG Host Cable Cord Adapter Micro USB Hub USB OTG Extension Adapter for Smartphone
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3 in 1 USB OTG Cable Adapter, 3 in 1 Micro USB HUB Adaptor with Power 3-Port Charging OTG Host Cable Cord Adapter Micro USB Hub USB OTG Extension Adapter for Smartphone