H309 - Headphones CoolBox - Free user manual and instructions
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| Product Type | Headphones |
| Brand | CoolBox |
| Model | H309 |
| Color | Black |
| Type | Over-ear |
| Driver Size | 40 mm |
| Frequency Response | 20 Hz – 20 kHz |
| Impedance | 32 Ohms |
| Sensitivity | 105 dB |
| Maximum Input Power | 30 mW |
| Connectivity | Wireless Bluetooth 5.0 |
| Bluetooth Version | 5.0 |
| Wireless Range | 10 m |
| Battery Type | Rechargeable lithium-ion |
| Battery Capacity | 400 mAh |
| Charging Time | 2 hours |
| Playback Time | 20 hours |
| Standby Time | 200 hours |
| Microphone | Yes, built-in |
| Noise Cancellation | Passive noise isolation |
| Weight | 250 g |
| Dimensions (folded) | 18 x 16 x 8 cm |
| Foldable | Yes |
| Included Accessories | USB charging cable, 3.5 mm audio cable |
| Material | Plastic, leatherette ear pads |
Frequently Asked Questions - H309 CoolBox
How do I pair the CoolBox H309 headphones with my device?
Turn on the headphones by pressing the power button. Activate Bluetooth on your device and select "CoolBox H309" from the list. If prompted, enter "0000" as the PIN.
How do I charge the headphones?
Connect the included USB charging cable to the headphones' charging port and a USB power source. The LED indicator will turn red during charging and blue when fully charged. Charging time is approximately 2 hours.
What should I do if the headphones do not turn on?
Make sure the battery is charged. If still not working, try resetting by pressing and holding the power button for 10 seconds. If the issue persists, contact support.
How do I adjust the volume?
Use the volume buttons on the ear cup. Press the + button to increase volume and the - button to decrease. A short press on the multifunction button can play/pause or answer calls.
Can I use the headphones while charging?
Yes, you can use the headphones in wired mode by connecting the 3.5 mm audio cable. Wireless playback is not possible during charging.
Are the headphones noise-cancelling?
The CoolBox H309 provides passive noise isolation through its over-ear design and cushioned ear pads. They do not feature active noise cancellation.
How do I clean the headphones?
Wipe the exterior with a soft, dry cloth. For the ear pads, use a slightly damp cloth and mild soap if needed. Avoid getting moisture into the speakers or charging port.
What is the warranty period?
The CoolBox H309 comes with a 1-year limited warranty against manufacturing defects. Keep your proof of purchase for warranty claims.
How long does the battery last?
The battery lasts up to 20 hours of continuous playback at moderate volume. Standby time is up to 200 hours.
Can I use the headphones with a wired connection?
Yes, the headphones include a 3.5 mm audio cable. Plug it into the headphone jack on the ear cup and connect to your device. This works even if the battery is dead.
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