C16 User Manual

Packing List

• Earbuds X2
• Charging Case X1
• Type-C Charging Cable X1
• User Manual X1

Visual representation of included items: two earbuds, a charging case, a USB-C charging cable, and the user manual.

Product Overview

Diagram showing the earbuds and charging case with the following components:

• Multi-function Button
• LED Indicator Light
• Charging Contacts
• Charging Case Power Display
• Earbud Charging Indicator
• Built-in Microphone
• Type-C Charging Port

Note: The wireless charging area is located on the back of the charging case.

Power On/Off

Auto Power On

The earbuds automatically turn on when the charging case lid is opened.

Manually Power On

Press and hold both earbuds for 2 seconds. The indicator lights will flash blue, and the earbuds will power on.

Visual: Illustration showing hands pressing and holding both earbuds for 2 seconds.

Auto Power Off

The earbuds automatically turn off when placed back into the charging case and the lid is closed.

Manually Power Off

Press and hold either earbud for 5 seconds. The indicator light will flash red, and the earbud will power off (in non-music mode).

Visual: Illustration showing a hand pressing and holding one earbud for 5 seconds.

Note: The earbuds will automatically power off if no devices are connected within 5 minutes.

Bluetooth Connection

Step 1: Pairing Mode Activation

Open the lid of the charging case. The two earbuds will automatically power on and enter pairing mode.

Step 2: Connect to Device

Activate Bluetooth settings on your smartphone, search for "C16", and then tap to connect.

Visual: Screenshot of a smartphone's Bluetooth settings showing "C16" as a discoverable device and connected.

After the initial connection, the earbuds will automatically connect to your phone whenever you open the charging case.

Single Mode & Pairing with Other Devices

Single Mode

To use a single earbud: while in dual mode, place one earbud into the charging case. Then, take only one earbud out of the case to connect and use it.

Pair with Other Device

The C16 Wireless Earbuds have a memory function and usually auto-connect to the last paired device. To pair with a new device:

1. Disconnect "C16" from the previously paired device.
2. Forget the pairing record on the previous device.
3. Then, attempt to connect to the new device.

Factory Restore Setting

When to Reset

• When only one earbud is playing music.
• When you cannot use both earbuds together.
• When both earbuds fail to pair with each other or encounter connection-related issues.

How to Reset

While the earbuds are connected and out of the charging case, press both earbuds 5 times simultaneously. The LED indicators on both earbuds will flash red and blue 5 times quickly, accompanied by a voice prompt "di" followed by "power off". This action successfully resets the earbuds and clears the pairing record with the last paired device.

Visual: Illustration showing hands pressing both earbuds 5 times.

Controls

Incoming Call

• Answer Call: Press (Left/Right) Earbud Once. ?
• End Call: Press (Left/Right) Earbud Once. ?
• Reject Call: Press (Left/Right) Earbud Twice. ?

Voice Assistance

• Activate Siri/Voice Assistant: Press (Left/Right) Earbud Thrice. ?

Note: Voice assistance can be activated in standby or play mode.

Music Mode

• Play/Pause: Press (Left/Right) Earbud Once. ▶️/⏸️
• Next Track: Press (Right) Earbud Twice. ⏭️
• Previous Track: Press (Left) Earbud Twice. ⏮️
• Volume Up: Press and Hold (Right) Earbud. ?
• Volume Down: Press and Hold (Left) Earbud. ?

Note: A voice prompt "di" will be heard when the minimum or maximum volume is reached.

Charging Case

Battery Indicator of Charging Case

The display will illuminate to show the remaining power of the charging case when the lid is opened, then it will turn off after 10 seconds. The number will flash while the case is being charged and will display "100" when fully charged, remaining on until the power supply is disconnected.

Visual: Illustration of the charging case with its power display showing "100".

Battery Indicator of Earbuds

Place the earbuds back into the charging case to charge them. The earbud charging indicator on the case will flash through 1st to 4th grid segments sequentially while charging and will turn off after the earbuds are fully charged.

Note: The C16 earbuds feature NTC temperature control protection. They will not charge if the temperature reaches 45 degrees Celsius or higher. The charging case will automatically protect itself in such cases. It is recommended to stop charging (or disconnect wireless charging) and recharge after the temperature drops below 45 degrees Celsius.

Wireless Charging

Occiam recommends using a QI-certified wireless charging pad (sold separately) for charging. If the charging case does not begin charging, try repositioning the case on the pad.

Visual: Illustration of the charging case placed on a wireless charging pad.

Specifications

Charging Case

• Battery Capacity: 500mAh
• Type-C Cable Charging Time: Approx. 2 hours
• Weight: Approx. 47g
• Dimensions: 56.2 x 50 x 25.9 mm
• Wireless Charging: Supported

Earbud (each)

• Model Name: C16
• Bluetooth Protocol: HSP/HFP/A2DP/AVRCP
• Transmission Distance: 10m / 33ft (without obstructions)
• Battery Capacity: 3.7V 40mAh
• Charging Time: Approx. 1.5 hours
• Weight: Approx. 3.5g per earbud

FAQ

How to fix charging issues on wireless earbuds?

1. If earbuds are stored for a long time without use, their lifespan or battery life may reduce. Please charge the charging case at least once every week.
2. The battery can over-discharge, potentially leading to battery failure. If the charging case's power level becomes critically low, the LED display might not show immediately when plugged in with a charging cable. Please wait approximately 15 minutes for the display to activate.
3. The charging contacts on the wireless earbuds may not be making proper contact with the charging pins inside the charging case due to repeated insertion and removal. Ensure that both the charging contacts on the earbuds and the pins in the case are clean and correctly positioned, and not damaged.
4. If earbuds are kept in pockets (e.g., jeans), lint, dust, or other debris can block the charging ports, leading to charging issues. Try cleaning the charging pins of the case and the charging contacts of the earbuds to remove any obstructions.
5. The constant bending and flexing of the charging cable for the charging case can degrade its charging ability over time. Charging issues may stem from a damaged charging cable. Occiam provides replaceable charging cables.

What if my phone can't detect my earbuds or the connection is not stable?

1. Already Connected to Another Device: The earbuds may already be paired with a different device. Disconnect them from that device and try pairing with your smartphone again.
2. Distance Too Great: The distance between the earbuds and your phone might be too far. Keep your phone close to your earbuds when attempting to connect both.
3. Bluetooth Interference: Other devices such as WiFi routers, other Bluetooth devices, or even microwaves can cause Bluetooth signals to become weak or interrupted.
4. Phone Bluetooth Disabled: Your phone's Bluetooth might be turned off, especially in low battery status. Ensure Bluetooth is enabled on your phone.
5. Smartphone Software Glitches: Minor software issues on your smartphone can sometimes cause problems. Try resolving this by turning your phone's Bluetooth off and then on again. If this does not work, try restarting your smartphone.
6. Power Saving or Airplane Modes: These modes often disable Bluetooth to conserve battery life. Turn off these modes to successfully connect your smartphone with your wireless earbuds.

For further assistance, please contact Occiam support.

FCC Warning Statement

Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation.

If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

Consult the dealer or an experienced radio/TV technician for help.

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

1. This device may not cause harmful interference, and
2. This device must accept any interference received, including interference that may cause undesired operation.