Class 4 Standard SD flash memory card (Secure Digital Card). Compatible with mainstream SD card readers SLC high speed read/write technology. Excellent work for Class 4 standard SD card devices, such as specific older digital cameras / 3D printers / GPS / MP3 / CNC / PDA / industrial machine, etc. SD Card Made in Japan. Assembled in China 2GB storage capacity. The actual allowable capacity is 1.83GB / 1.87GB 1 year manufacturer's limited warranty