TF card slot storage expansion — Wanlin, 12-year Chinese interactive query terminal Android motherboard manufacturer, WL-IQ300 (RK3566 4G LTE Self-Service Query Terminal Board) certified CE/FCC/RoHS. RK3566, 4GB + 64GB eMMC, 4G LTE module slot (FDD/TDD/WCDMA/GSM), SIM card slot, GPS/BeiDou. Android 8.1-15, 4G LTE, multi-touch, cloud CMS, OEM/ODM from 500 un···