1. Overview
The Sharper Image SBT558BKGM Bluetooth Wireless Headphones are designed to deliver high-performance audio with enhanced bass and clear highs. These headphones connect wirelessly to any Bluetooth-enabled device, allowing for playback control and hands-free calling via the built-in microphone. The foldable design enhances portability, and the soft, padded ear cups provide comfort while reducing ambient noise. The headband is fully flexible and adjustable for a secure fit. A durable hard carrying case is included for safe storage and transport.
The long-lasting rechargeable battery provides extended listening time, and the smooth rubber finish with reflective accents offers a modern aesthetic.
2. Safety Information
Please read all safety instructions carefully before using this product. Improper use may result in damage to the product or personal injury.
- Do not expose the headphones to extreme temperatures, humidity, or direct sunlight.
- Avoid dropping or subjecting the headphones to strong impacts.
- Do not disassemble, repair, or modify the headphones. This will void the warranty.
- Clean the headphones with a soft, dry cloth only. Do not use liquid cleaners or aerosols.
- Prolonged listening at high volume levels may cause permanent hearing damage. Always adjust the volume to a comfortable level.
- Keep the headphones away from water and other liquids.
- Dispose of batteries according to local regulations. Do not dispose of batteries in fire.
3. Package Contents
Ensure all items are present in the package:
- Sharper Image SBT558BKGM Bluetooth Wireless Headphones
- Hard Carrying Case
- USB Charging Cable
- 3.5mm Audio Cable (Auxiliary Cable)
- User Manual (this document)
4. Product Features and Components
Familiarize yourself with the various parts of your headphones.

Figure 4.1: Sharper Image SBT558BKGM Bluetooth Wireless Headphones. This image shows the overall design of the black wireless headphones with padded earcups and an adjustable headband.

Figure 4.2: Close-up view of the control panel located on the right ear cup. This includes buttons for power, play/pause, volume up/next track, and volume down/previous track, along with a microphone.

Figure 4.3: The included hard carrying case for the Sharper Image SBT558BKGM headphones. The case is black with a zipper closure and a small fabric loop.
Key Components:
- Power/Multi-function Button: Used for powering on/off, play/pause, answering/ending calls.
- Volume Up / Next Track Button: Increases volume with a short press, skips to next track with a long press.
- Volume Down / Previous Track Button: Decreases volume with a short press, skips to previous track with a long press.
- Built-in Microphone: For hands-free calling.
- 3.5mm Aux Port: For wired connection to audio devices.
- Micro USB Charging Port: For charging the internal battery.
- LED Indicator Light: Shows power, charging, and Bluetooth status.
- Adjustable Headband: For a comfortable and secure fit.
- Padded Ear Cups: Provide comfort and passive noise isolation.
5. Setup
5.1 Initial Charging
Before first use, fully charge your headphones. Connect the small end of the included USB charging cable to the Micro USB charging port on the headphones and the larger end to a USB power source (e.g., computer USB port, USB wall adapter). The LED indicator light will illuminate during charging and change color or turn off when charging is complete.
5.2 Bluetooth Pairing
- Ensure the headphones are turned off.
- Press and hold the Power/Multi-function button for approximately 5-7 seconds until the LED indicator light flashes blue and red alternately. This indicates the headphones are in pairing mode.
- On your Bluetooth-enabled device (smartphone, tablet, computer), go to the Bluetooth settings.
- Enable Bluetooth and search for available devices.
- Select "SBT558BKGM" from the list of found devices.
- Once paired, the LED indicator light on the headphones will typically flash blue slowly or remain solid blue, and you may hear an audible confirmation.
- If prompted for a password, enter "0000" (four zeros).
The headphones will automatically attempt to reconnect to the last paired device when powered on.
6. Operating Instructions
6.1 Power On/Off
- Power On: Press and hold the Power/Multi-function button for approximately 3 seconds until the LED indicator light flashes blue and you hear an audible prompt.
- Power Off: Press and hold the Power/Multi-function button for approximately 3-5 seconds until the LED indicator light turns off and you hear an audible prompt.
6.2 Music Playback
- Play/Pause: Press the Power/Multi-function button once.
- Next Track: Press and hold the Volume Up (+) button.
- Previous Track: Press and hold the Volume Down (-) button.
- Volume Up: Short press the Volume Up (+) button.
- Volume Down: Short press the Volume Down (-) button.
6.3 Call Handling
- Answer/End Call: Press the Power/Multi-function button once.
- Reject Call: Press and hold the Power/Multi-function button for approximately 2 seconds.
- Redial Last Number: Double-press the Power/Multi-function button.
6.4 Auxiliary (Wired) Mode
To use the headphones with non-Bluetooth devices or when the battery is depleted, connect the included 3.5mm audio cable to the Aux port on the headphones and to the audio output of your device. In wired mode, the headphone controls (volume, track control, call handling) may not function, and control will be managed directly from the connected audio device.
7. Maintenance and Care
7.1 Cleaning
Wipe the headphones with a soft, dry, lint-free cloth. Do not use abrasive cleaners, solvents, or chemical agents. Do not immerse the headphones in water or any other liquid.
7.2 Storage
When not in use, store the headphones in the included hard carrying case to protect them from dust, scratches, and impacts. Store in a cool, dry place away from extreme temperatures.
7.3 Battery Care
To prolong battery life, avoid fully discharging the battery frequently. Charge the headphones regularly, even if not used for extended periods. Do not expose the battery to excessive heat.
8. Troubleshooting
If you experience issues with your headphones, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Headphones won't power on. | Battery is depleted. | Charge the headphones fully. |
| Cannot pair with Bluetooth device. | Headphones not in pairing mode. Bluetooth is off on your device. Device is too far from headphones. Interference. | Ensure headphones are in pairing mode (flashing red/blue). Turn on Bluetooth on your device. Move device closer to headphones (within 10 meters). Turn off other Bluetooth devices nearby. |
| No sound or low volume. | Volume too low on headphones or device. Headphones not properly paired. Incorrect audio output selected on device. | Increase volume on both headphones and connected device. Re-pair the headphones. Check your device's audio settings to ensure output is set to Bluetooth headphones. |
| Sound quality is poor. | Weak Bluetooth signal. Interference. Audio file quality. | Move closer to the connected device. Avoid obstacles between headphones and device. Try playing a different audio file. |
| Microphone not working during calls. | Headphones not selected as audio input. Microphone muted on device. | Check your device's call settings to ensure headphones are selected for audio input. Ensure microphone is not muted on your device. |
9. Specifications
| Feature | Specification |
|---|---|
| Model Number | SBT558BKGM |
| Connectivity Technology | Wireless - Bluetooth |
| Driver Unit | 40mm |
| Bluetooth Chip | Built-in |
| Playing Time | 12-14 hours |
| Standby Time | 18-20 hours |
| Battery Capacity | 400 mAh (Lithium Ion) |
| Operation Range | 10-12 meters |
| Frequency Range | 2.4-2.48 GHz |
| Built-in Microphone | Yes |
| Aux Port | 3.5mm |
| Control Type | Volume Control, Touch (for playback/calls) |
| Material | Rubber |
| Color | Black |
| Product Dimensions | 19.3 x 12.7 x 19.81 cm |
| Item Weight | 771.1 g |
10. Warranty and Support
For warranty information and customer support, please refer to the warranty card included with your product or contact Sharper Image customer service directly. Keep your purchase receipt as proof of purchase for warranty claims.
Manufacturer: Southern Telecom
Place of Business: BROOKLYN, NY, 11220 US
For the most up-to-date support information, please visit the official Sharper Image website or contact their customer service department.




