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M5Stick-C IoT Development Kit + Watch Accessories : ID 4289 : $29.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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Amazon.com: AURSINC WiFi Deauther Watch ESP8266 Development Board | Wearable Watch | OLED | Attack/Control/Test Tool | LOT for DSTIKE NodeMCU (White V1) : Electronics
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Mixtile Gena Wearable Smart Watch Electronic Development Kit, Smart watch Wearable Smart Watch Development Kit Bluetooth Smart Watch - Buy China Mixtile Gena Wearable Smart Watch Electronic Devel on Globalsources.com
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Amazon.com: MakerFocus W i F i Test Tool ESP8266 W i F i Deauther Watch V2 DSTIKE NodeMCU ESP8266 Programmable Development Board Built in 800mAh Battery with OLED Dispaly, Wristband and 3D
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The $27 PineTime smartwatch runs open-source software and now it's ready for non-developers - Liliputing
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Hexiwear is an Open Source Wearable Development Kit Expandable with Add-on Boards (Crowdfunding) - CNX Software
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