1X(The num lock function is of any other keyboard that are currently connected.The mechanical switch keypad can a fast response.
Compare with the other standard keypad, the 21 keys extended some keys at the top, contain Esc,Tab,Back Space,and FN keys.
Mechanical numberic keypad has 3 backlight model and 6 backlight brightness can be adjusted. By simultaneously pressing the FN key and another key, you can change the backlight and brightness.

Keyboard Connection:WIRED
Type:ERGONOMIC
Interface:bluetooth
Brightness adjustment:6 levels
Backlight mode:3 types
Style:weak
Pressure feeling:45g +/- 20g
Luminous:white
Line length:1.5 (meters)
Whether to support ergonomics:support
Backlight function:support backlight
Key technology:mechanical shaft
Waterproof function:does not support waterproof
Do you have hand rest:No
Shortcut key:none
Whether there are multimedia function ke:none
Connection with computer:wired
Whether to support plug and play:support
Number of keys:21 (keys)
Type:Numeric keyboard
Applicable models:general
Suitable for: notebook users; financial, banking and securities workers; counter cash registers; mechanical keyboards without keyboard area
Size:12.3 x 8.2 x 4.2cm
color:White
Material:ABS+PBT

Package Contents:
1 x Mechanical Numeric Keypad)