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Amazon.com: Rock Pi 4 Plus Rockchip RK3399(OP1) Single Board Computer LPDDR4 4GB with WiFi 5 and Bluetooth 5.0 Support Twister OS (4GB RAM+64GB eMMC) : Electronics
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Amazon.com: Rock Pi 4 SE Single Board Computer 4GB LPDDR4 RAM Rockchip RK3399-T ARM Cortex-A72 (NS8889316) : Electronics
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