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This tiny smart ring lets you remotely control your smartphone without taking it out of your pocket - Yanko Design
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Mini Bluetooth 5.1 Self-timer Remote Control Button Wireless Controller Smart Finger Ring Wearable Devices Phone Bluetooth Ring - Walmart.com
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Amazon.com: Smart Ring, NFC Multi-Function Smart Rings Magic Wearable Device Universal for Mobile Phone, Connecte to The Mobile Phone Function Operation and Sharing of Data(7in) : Electronics
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RFID / NFC Smart Ring - Size 10 - NTAG213 : ID 2804 : $44.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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