Powerful Functional Keys: This 7Lucky keypad has 28-keys with multiple useful shortcuts including NUMLOCK, DEL, ESC, Tab, Home, End, Page up/down,bonus symbols keys and calculator export button, etc. Meet all you need of a number keyboard.Lightweight & Ultra Slim: Very portable number pad allows you to carry it anywhere easily, fits your handbag and backpack without taking much space.Specification? Connection Mode: Bluetooth 3.0 Item Weight?0.25lb Item Dimension?5.1*4.2*0.5in Number of Keys: 28 keys Wireless Operation Distance: 10m without block Auto sleep mode: After 10-15 minutes Auto power-saving mode: when not in use for 10-15 minutes 3 in 1 LED Indicator Light : Bluetooth pairing mode, Battery Status, and NUMLOCK function Battery Required?2AAA batteries(not included)How To Connect 1) Insert 2 AAA batteries and switch ON/OFF button to power the keypad 2) Press the bluetooth key for 3 second until the LED light twinkles 3) Go to system preferences>Select device>Add device.Compatibility: Support Bluetooth-enabled Cellphone Tablet PC Laptop Desktop with Android Windows 2000/ Me/ 98/ XP /Vista/ 7/ 8/10 system.NOTE: 1. For Desktop PC Laptop without bluetooth function, you need to use third-party bluetooth adapter (not included) before use 2. This number pad is NOT completely compatible with Macbook OS system and Apple iOS system, Calculator Key and Functional Keys can not work but other number and symbol keys including ESC, Tab work wellPackage Included? 1× 7Lucky Bluetooth 28-key Numeric Keypad 1× User Manual