Sony WI-C400 Reference guide
Help Guide
Wireless Stereo Headset
WI-C400
Use this manual if you encounter any problems, or have any questions.
This Help Guide is also available as a PDF, which can be downloaded here.
Getting started
What you can do with the BLUETOOTH function
About voice guidance
Supplied accessories
Checking the package contents
Replacing the earbuds
Adjusting the cable length
Parts and controls
Location and function of parts
About the indicator
Power/Charging
Charging the headset
1
Available operating time
Checking the remaining battery charge
System requirements for battery charge using USB
Turning on the headset
Turning off the headset
Making connections
How to make a wireless connection to BLUETOOTH devices
One-touch connection (NFC) compatible Android devices
One-touch connection (NFC) with a smartphone (Android 4.1 or later)
Disconnecting the smartphone by one touch (NFC)
Switching the device by one touch (NFC)
Android devices not compatible with one-touch connection (NFC)
Pairing and connecting with an Android smartphone
Connecting to a paired Android smartphone
iPhone (iOS devices)
Pairing and connecting with an iPhone
Connecting to a paired iPhone
Computers
Pairing and connecting with a computer (Windows 10)
Pairing and connecting with a computer (Windows 8/Windows 8.1)
Pairing and connecting with a computer (Windows 7)
Connecting to a paired computer (Windows 10)
Connecting to a paired computer (Windows 8/Windows 8.1)
Connecting to a paired computer (Windows 7)
Other BLUETOOTH devices
Pairing and connecting with other BLUETOOTH devices
Connecting to a paired BLUETOOTH device
Disconnecting BLUETOOTH connection (after use)
Listening to music
Listening to music via a BLUETOOTH connection
2
Listening to music from a device via BLUETOOTH connection
Controlling the audio device (BLUETOOTH connection)
Disconnecting BLUETOOTH connection (after use)
Supported codecs
Making phone calls
Receiving a call
Making a call
Functions for a phone call
Disconnecting BLUETOOTH connection (after use)
Using the voice assist function
Using the voice assist function (Google App)
Using the voice assist function (Siri)
Important information
Precautions
Trademarks
Customer support websites
Troubleshooting
What can I do to solve a problem?
Power/Charging
The headset is not turned on.
Charging cannot be done.
Charging time is too long.
The remaining battery charge of the headset is not displayed on the screen of an iPhone or iPod touch.
Sound
No sound
Low sound level
Low sound quality
Sound skips frequently during playback.
BLUETOOTH
Pairing cannot be done.
3
4-698-107-11(2) Copyright 2017 Sony Corporation
Unable to connect the headset to a BLUETOOTH device with one-touch connection (NFC)
Unable to make a BLUETOOTH connection
Distorted sound
The BLUETOOTH wireless communication range is short, or the sound skips.
The headset does not operate properly.
No voice from callers
Low voice from callers
Resetting or initializing the headset
Resetting the headset
Initializing the headset to restore factory settings
4
Help Guide
Wireless Stereo Headset
WI-C400
What you can do with the BLUETOOTH function
The headset uses BLUETOOTH® wireless technology, allowing you to listen to music or make phone calls wirelessly.
Listening to music
You can receive audio signals from a smartphone or music player to enjoy music wirelessly.
Talking on the phone
You can make and receive a call with your hands free, while leaving your smartphone or mobile phone in your bag or
pocket.
4-698-107-11(2) Copyright 2017 Sony Corporation
5
Help Guide
Wireless Stereo Headset
WI-C400
About voice guidance
You hear voice guidance in the following situations via the headset.
When powering on: “Power on”
When powering off: “Power off”
When entering pairing mode: “BLUETOOTH pairing”
When establishing a BLUETOOTH connection: “BLUETOOTH connected”
When disconnecting a BLUETOOTH connection: “BLUETOOTH disconnected”
When checking the remaining battery charge: “Battery level high” / “Battery level medium” / “Battery level low”
When automatically turning off due to the low battery condition: “Please recharge headset”
When turning on the vibration function for receiving a call : “Vibration on”
When turning off the vibration function for receiving a call : “Vibration off”
4-698-107-11(2) Copyright 2017 Sony Corporation
6
Help Guide
Wireless Stereo Headset
WI-C400
Checking the package contents
After opening the package, check that all items in the list are included in the package. If items are missing, contact your
dealer.
Numbers in ( ) indicate the item amount.
Wireless Stereo Headset (1)
Micro-USB cable (approx. 50 cm (19 3/4 in.)) (1)
Hybrid silicone rubber earbuds (SS/S/M/L 2 each)
Size M earbuds come attached to the headset.
Reference Guide (1)
Operating Instructions (1)
Other documents (1 set) (*)
4-698-107-11(2) Copyright 2017 Sony Corporation
May not be supplied in some countries or regions.
*
7
Help Guide
Wireless Stereo Headset
WI-C400
Replacing the earbuds
The headset comes with the M size earbuds.
If the headset tends to come off or you feel a lack of low frequency sound, change the earbuds to another size to fit your
right and left ears comfortably and snugly.
A: SS size (one line)
B: S size (two lines)
C: M size (three lines)
D: L size (four lines)
4-698-107-11(2) Copyright 2017 Sony Corporation
Remove the earbuds.
Do not pinch the end of the earbud when removing it.
1
Attach the earbuds.
Do not attach the earbuds loose or skewed.
2
8
Help Guide
Wireless Stereo Headset
WI-C400
Adjusting the cable length
You can adjust the cable length by using the cable adjuster to fix the cable.
Slide the cable adjuster to fit the headset to your head.
You can put the right and left units on the headset body when you do not use the headset.
Put the stopper into a hole to fix the units.
4-698-107-11(2) Copyright 2017 Sony Corporation
9
Help Guide
Wireless Stereo Headset
WI-C400
Location and function of parts
left unit1.
Earbuds2.
right unit3.
Stopper4.
R mark5.
Cable adjuster
You can adjust the cable length by using this adjuster to fix the cable.
6.
N-mark7.
Tactile dot
The left unit has a tactile dot.
8.
L mark9.
Built-in antenna
A BLUETOOTH antenna is built into the headset.
10.
Indicator (blue/red)
Lights up in red during charging.
Lights up in red or blue to indicate the power or communication status of the headset.
11.
- ( ) / ( ) + buttons12.
Multi-function button
/ button
Controls various call and playback functions.
13.
(power) button14.
10
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