Wi-Fi CERTIFIED™ is an internationally-recognized seal of approval for products indicating that they have met industry-agreed standards for interoperability, security, and a range of application specific protocols. Wi-Fi CERTIFIED products have undergone rigorous testing by one of our independent Authorized Test Laboratories. When a product successfully passes testing, the manufacturer or vendor is granted the right to use the Wi-Fi CERTIFIED logo. Certification means that a product has been tested in numerous configurations with a diverse sampling of other devices to validate interoperability with other Wi-Fi CERTIFIED equipment operating in the same frequency band. Certification is available for a wide range of consumer, enterprise, and operator-specific products, including smartphones, appliances, computers and peripherals, networking infrastructure, and consumer electronics. At retail, the Wi-Fi CERTIFIED logo gives consumers confidence that a product will deliver a good user experience. Service providers and enterprise IT managers specify Wi-Fi CERTIFIED to reduce support costs and ensure a product has met industry-agreed requirements. Y When performance is your priority, rely on proven, trusted technology. With the cylindrical lithium-ion battery cell your laptop gets stable power that’s great for high-performance devices. Lithium-Ion (Li-Ion) DisplayPort 1 Numeric keyboard Y Hard Drive HDD DIRECTIVE (EU) 2022/2380 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 23 November 2022 (Part III) y HP ProBook 6555b, AMD Athlon II, 2.2 GHz, 39.6 cm (15.6"), 4 GB, 250 GB, Windows 7 Professional HP ProBook 6555b. Product type: Laptop, Form factor: Clamshell. Processor family: AMD Athlon II, Processor model: P340, Processor frequency: 2.2 GHz. Display diagonal: 39.6 cm (15.6"). Internal memory: 4 GB, Internal memory type: DDR3-SDRAM. Total storage capacity: 250 GB, Storage media: HDD, Optical drive type: DVD-RW. Operating system installed: Windows 7 Professional. Product colour: Black. Weight: 2.51 kg