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KB4 Bluetooth Keyboard

Thank you for purchasing the Califone

®

 Model KB4 Bluetooth Keyboard.

We encourage you to visit 

www.califone.com/registration

 to register 

your product for its warranty coverage, to sign up to receive our 
newsletter, download our catalog, and learn more about the 
complete line of Califone

®

 audio visual products, including portable 

and installed wireless PA systems, multimedia players and recorders, 
headphones and headsets, computer peripheral equipment, visual 
presentation products and language learning materials.

Package Contents

 

 Ultra-slim KB4 Bluetooth keyboard

 Micro-USB charging cable

 User manual

Bluetooth Specification

Broadcom 3.0 chip

Dimensions

247 x 150 x 6.5mm

Operating Range

Up to 10 meters

Modulation System

GFSK

Standy time

30 days

Charge time

4 hours

Uninterrupted Work Time

44 hours

Lithium Battery Capacity

110 mAh

Lithium Battery Life

3 years

Key Life

3 million clicks

Specifications

Getting 

Started Guide

 

How to Sync the Keyboard 

Step 1:

 Slide the power button to “on”. The blue status light will illuminate 

for 4 seconds. The KB4 is still on.

Step 2:

 Press the [connect] button, the [Bluetooth] indicator light 

will be blinking blue

Step 3:

 On the device to be synced with the KB4, select: <Setting/ 

General / Bluetooth / On>

Step 4:

 The device will display “Bluetooth 3.0 keyboard or Califone 

Keyboard” as an available device.

Step 5: 

Select “Bluetooth 3.0 keyboard” on the device and the device 

will immediately then display a code generated by the KB4

Step 6:

 Type the code on the KB4 and press enter; keyboard will now 

be paired to the device.

After pairing for the first time, your device will connect to the keyboard 

automatically when powering on the keyboard.

Note:

 In case of connect failure, delete the pairing record from your 

device and try the above procedures again.

ON/OFF

CONNECT

Button

On/Off slider switch: ON or OFF to control power for the device. 

Bluetooth connect button:

 The On/Off switch is already in the On 

position, Press the [connect] button, The KB4 is now ready to be 

connect to your device.

Caps lock light:

 Status light when stay on under the uppercase

Bluetooth connect button:

 The On/Off switch is already in the On 

position, Press the [connect] button, The KB4 is now ready to be 

connect to your device.

Charging light (Red):

 lights when charging and will turn off once 

the KB4 is fully charged.

Battery status light:

 slider the power button on. The red status light 

will illuminate for four seconds and then turn off to save power. THE 

KB4 keyboard is still on.

Note:

Press FN and Q,W or E keys together to shift between Android, Windows or 

iOS systems after successfully connecting the KB4. Otherwise the keyboard’s 

function key will be invalid.

Q - iOS

W - Android

E - Windows

Power Saving Mode

The keyboard cover will enter sleep mode after being idle for 15 minutes. To 

activate it, press any key and wait for 3 seconds.

Charging the keyboard

To charge the KB4, connect it to a powered USB port using the cable that 

comes with the keyboard. 

Usage tips

1. Do not place heavy objects on the keyboard cover.

2. Do not knock or dismantle the product.

3. Keep the product away from oil, chemicals, and organic liquids.

4. Clean the product by lightly rubbing it with a slightly damp cloth.

5. Dispose of batteries according to local laws.

Status Light 

CAPS

CHARGE

POWER

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