Dell Bluetooth Keyboard Folio WK415 - Manual (Page 7)

Set Up Your Keyboard │ 7
2. Press the Bluetooth button for 3 seconds to enable pairing mode.
3. Pair the keyboard.
a. On your tablet, tap → Settings → WIRELESS & NETWORKS→
Bluetooth.
b. Enable Bluetooth by moving the slider to ON position.
c. Tap Bluetooth.
d. Tap Dell WK415 Keyboard.
e. Follow the instructions on the screen.