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A close-up photorealistic render of a black compact digital seawater thermometer keyring showing 'SEAWATER 24.80C' on its screen.

A close-up photorealistic render of a black compact digital seawater thermometer keyring showing 'SEAWATER 24.80C' on its screen.
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A highly realistic 3D render of a compact digital seawater thermometer keyring device, designed for ocean temperature awareness. The device has a smooth, minimalistic square body (40×40×14 mm), matte polycarbonate finish, with a transparent front window. Inside the front window, a small 0.49" OLED display (SSD1306) shows numeric water temperature. On the right side, a slim red sliding power switch is visible. On the bottom, a small stainless steel DS18B20 sensor tip slightly protrudes, with a sealed epoxy entry point for waterproofing. The back side has a USB-C charging port, covered with a silicone plug for waterproofing. Inside the casing: - Top: OLED display module aligned with the transparent window. - Middle: Seeeduino XIAO microcontroller board, horizontally placed. - Bottom left: compact LiPo 150 mAh battery (30×20×5 mm). - Bottom right: small auxiliary PCB with a 4.7kΩ resistor and capacitors. The case seam is sealed with an O-ring around the midline. Overall look: modern, compact, keyring-sized gadget. Lighting: studio product photography style, soft shadows, clean white background. Render style: ultra-realistic, high detail, photorealistic product shot. See more

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