sainsmart 1.8 tft lcd pricelist

This ST7735S 1.8" TFT Display features a resolution of 128×160 and SPI (4-wire) communication. Integrated with an SD card slot, it allows you to easily read full-color bitmaps from the SD card.

The sainsmart 1.8 inch lcd contains the sda/scl and cs lines but it claims to be an spi interface. To me it looks more like an i2c interface, see link.

On the SD card side of the board there are miso/mosi/clk and cs pins and that looks like a an spi bus. But I don"t see anywhere on sainsmarts website that they have dual bus on the board, meaning the lcd operates on i2c (or spi) and the SD on spi (or whatever the f).