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Each board: dual-core ESP32, 4MB Flash, Wi-Fi 2.4GHz and Bluetooth, USB Type-C for power and programming (CH340 serial), and a 500mA LiPo charger.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3 SHIELDS, 3 WAYS TO WIRE\u003c\/strong\u003e One of each, by design: 2.54mm pin header for fast jumper changes, spring terminal for tool-free rewiring, and screw terminal for the most secure, vibration-resistant hold. All three shields arrive fully assembled — no soldering needed on the shields.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJST-PH 2.0 BATTERY PORT + LEVEL MONITORING\u003c\/strong\u003e Plug a single-cell 3.7V lithium battery — LiPo pouch or protected 18650, not included — into the JST-PH 2.0 port. Bridge the BATTERY MONITOR pads on a shield to read battery voltage on IO36 through a 1:2 divider. 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Power via USB-C (5V) or VIN pin (5–12V); do not exceed 5V on the USB-C ports.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePRE-SOLDERED, PLUG-IN DESIGN\u003c\/strong\u003e ESP32-S3 boards come with pre-soldered pin headers and plug directly into the included expansion and terminal boards — no soldering required. 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