VidaBay's Classic Plus NFC E-Ink Fridge Magnet is a battery-free digital photo frame shaped like a Polaroid. It uses the E Ink Spectra 3100 color display — the same low-power technology found in electronic shelf price tags — and draws all its power from a smartphone's NFC chip when updating images via VidaBay's mobile app. Once an image is set, it persists indefinitely without any power. Available in white, red, or yellow for $29.99 each (discounted), the main limitation is the Spectra 3100's four-color palette (black, yellow, red, white), which produces far less accurate color reproduction compared to higher-end E Ink panels like the Spectra 6.
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