Lenovo 520 RF Wireless Optical Mouse in Black Platinum 1,000 DPI Refurbished Smartphone 6 cm Anti glare screen Yes 6 cm Anti glare screen Yes Country of origin China Harmonized System (HS) code 8471300000 8 GHz Processor cores 4 Processor threads 4 Processor manufacturer Intel Processor family Intel Celeron Memory ECC No Memory form factor On board Internal memory 4 GB Internal memory type DDR4 SDRAM Memory clock speed 3200 MHz Non ECC Yes Storage Storage media SSD Optical drive type No Number of SSDs installed 1 SSD capacity 128 GB SSD interface PCI Express Receive all day comfort and maximum ergonomics with this unique and contoured design and durable soft touch finish 4 GHz wireless technology via nano USB receiver