[LIMITED LIFETIME WARRANTY] This product comes with a limited lifetime warranty. Reach out to our experienced and dedicated USA-based customer support 24 hours a day, 7 days a week. Please refer to Fosmon’s website for more information. [POWER SAVING DESIGN] Tired of always having to repair your devices together after stepping away for a few minutes? No Stress, No More! After 10 mins without use, Fosmon's Numeric Keypad will enter into power-saving mode conserving the two AAA alkaline batteries ensuring a longer battery lifespan. The Numpad will immediately reactivate after any key is pressed reassuring you to never have to repair your devices on your coffee break again. [INTUITIVE FUNCTIONALITY] The NumLock button deploys by activating the cursor and screen control key functions, including Directional/Arrow keys, Escape key (Esc), Insert, Home, Page Up, Page Down, Delete, and End keys. After pushing the NumLock button, the Tab key LED will turn OFF to indicate the additional shortcut keys functions are activated. All numeric keys will no longer be operational. The Tab key LED must be ON at all times for the numeric keys to work its original functions. [NO COMPLICATED PAIRING NECCESSARY] Plug and play functionality. No drivers or pairing procedure is required. Simply insert the provided 2.4GHz USB receiver adapter from the back of the Numpad and slide the ON/OFF switch to any computer/laptop, gaming console, most smart T.V's with any USB port. When switching ON the Fosmon's Numeric Keypad, the Tab key LED indicator will automatically be ON allowing all numerical keys to start working immediately. NOTE: Not compatible with any Roku devices. [PORTABLE 22 KEY NUMERIC KEYPAD] Fosmon's 22 Numeric Keypad with non-slip rubber base protection help make working in excel and constantly on the go for work or school be exceedingly effortless. This lightweight Numpad design is specifically for transporting in compact bags with up to 33 FT device connection distance with ten keys contributing short-cut functions to the cursor and screen control keys guaranteeing slick operation.