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GT-2217F5RK-BKGB
Summary:size: 22X17MM Broadcom BK1662 chip dual-frequency multi-band RTK algorithm
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GT-1612F5A-AGGB
Summary:size: 16X12MM MTK AG335AA chip dual-band multimode 10Hz
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GT-2217TFRK-BKGB
Summary:size: 22X17MM BK1662G chip L1+L2+L5 triple-frequency multi-band RTK algorithm