Siindoo JH-820

Siindoo JH-820 Wireless Bluetooth Headphones User Manual

Model: JH-820

Introduction

Thank you for choosing the Siindoo JH-820 Wireless Bluetooth Headphones. This manual provides essential information for setting up, operating, and maintaining your headphones to ensure optimal performance and longevity. Please read this manual thoroughly before using the product.

Siindoo JH-820 Wireless Bluetooth Headphones, black color, angled view showing earcups and headband.

Image: Siindoo JH-820 Wireless Bluetooth Headphones in black, showcasing the sleek design and comfortable earcups.

What's in the Box

Verify that all items are present in the package:

  • Siindoo JH-820 Headphone
  • 0.5m Type-C charging cable
  • 1.2m AUX cable
  • User Manual (this document)
Contents of the Siindoo JH-820 headphone box, including the headphones, charging cable, AUX cable, and user manual.

Image: The complete package contents of the Siindoo JH-820 headphones, neatly laid out.

Product Features

The Siindoo JH-820 headphones are designed to provide a superior audio experience with convenience and comfort.

High Fidelity Audio

Equipped with 40mm acoustic stereo drivers, these headphones deliver crystal clear highs, balanced mids, and powerful bass. Three EQ modes allow you to customize the sound profile to suit different music genres, ensuring an immersive listening experience.

Diagram showing the internal components of the headphone driver, highlighting BT 5.4, HiFi Quality, and Hear Details features.

Image: An exploded view illustrating the advanced audio components and features like Bluetooth 5.4 and HiFi sound quality.

Image showing the headphone with an indicator pointing to the EQ switch, and three examples of sound modes: POP, Vocal, and Bass.

Image: Visual representation of the 3 EQ modes (POP, Vocal, Bass) accessible via the headphone controls.

Seamless Bluetooth 5.4 Connection

The headphones feature Bluetooth 5.4 for a quick, stable, and reliable wireless connection. They are compatible with a wide range of Bluetooth-enabled devices, including smartphones, tablets, laptops, and MP3/MP4 players. A simple slide of the on/off button initiates pairing mode.

Siindoo JH-820 headphones with icons indicating compatibility with Computer, iOS, Smartphone, and Android devices.

Image: The Siindoo JH-820 headphones demonstrating compatibility with various operating systems and devices.

Adjustable and Portable Design

Designed for comfort, the headphones feature an ergonomic design with ultra-soft ear cups and an adjustable headband, ensuring a comfortable fit for various head shapes. The foldable design allows for easy storage and portability, making them ideal for travel, online courses, or daily use.

Images illustrating the folding design, adjustable headband, and soft earmuffs of the Siindoo JH-820 headphones, with a person wearing them comfortably.

Image: Features of the headphone's design, including its foldable nature, adjustable headband, and soft earcups for extended comfort.

Long Battery Life & Dual Mode

The JH-820 headphones offer up to 28 hours of music playtime on a full charge, with a fast charging time of approximately 2-2.5 hours. For extended use or when the battery is depleted, you can switch to wired mode using the included 3.5mm AUX cable, ensuring uninterrupted listening.

Image showing a person using the headphones with text indicating 40 hours of playtime and a quick charge feature: 5 minutes of charging provides 2 hours of playtime. Also shows support for simultaneous connection to 2 devices.

Image: Information on battery life and quick charging capabilities, highlighting the convenience for users on the go.

Note: While the image indicates "40 Hours Super-long Playtime", the product specifications state approximately 28 hours of music time. Actual playtime may vary based on volume level and audio content.

Clear Conversations

A built-in microphone ensures clear voice quality for hands-free calling and seamless interaction with voice assistants on compatible smartphones.

Setup Guide

1. Initial Charging

  1. Connect the small end of the included Type-C charging cable to the Type-C charging port on the headphone.
  2. Connect the large end of the charging cable to a USB power adapter (not included) or a computer's USB port.
  3. The charging indicator light will illuminate during charging. It will turn off or change color once fully charged (approximately 2-2.5 hours).
  4. Note: Ensure the headphones are fully charged before first use for optimal battery life.

2. Bluetooth Pairing

  1. Ensure the headphones are turned off.
  2. Slide the Power On/Off button to the "On" position. The Bluetooth indicator light will flash, indicating the headphones are in pairing mode.
  3. On your device (smartphone, tablet, laptop), enable Bluetooth and search for available devices.
  4. Select "Siindoo JH-820" from the list of found devices.
  5. Once successfully paired, the Bluetooth indicator light will stop flashing and remain solid.
  6. Note: If prompted for a password, enter "0000".

3. Wired Connection (AUX Mode)

  1. Insert one end of the included 3.5mm AUX cable into the 3.5mm jack on the headphone.
  2. Insert the other end of the AUX cable into the audio output jack of your device.
  3. The headphones will automatically switch to wired mode. No battery power is required for wired listening.

Operating Instructions

Familiarize yourself with the control buttons located on the earcup:

Diagram of the headphone's control buttons, including Power On/Off, Volume Up/Next Song, Volume Down/Previous Song, Call/EQ switch, 3.5mm jack, Type-C charging port, and Microphone.

Image: Detailed layout of the control buttons and ports on the Siindoo JH-820 headphones.

Headphone Control Functions
Button/PortFunction (Short Press)Function (Long Press)
Power On/OffN/APower On/Off
"+" ButtonVolume UpNext Song
"-" ButtonVolume DownPrevious Song
Multi-function Button (Play/Pause)Play/Pause music; Answer/End callReject call; Activate Voice Assistant
EQ Switch ButtonCycle through EQ modes (POP, Vocal, Bass)N/A
3.5mm JackFor wired audio connection (AUX mode)
Type-C Charging PortFor charging the headphone battery
MicrophoneFor hands-free calls and voice assistant commands

The headphones are suitable for various activities, including travel, study, and daily entertainment.

Three images showing people using the Siindoo JH-820 headphones in different scenarios: during travel, while using a voice assistant, and for daily entertainment.

Image: Examples of how the Siindoo JH-820 headphones can be used in various daily situations.

Maintenance

Proper care will extend the life of your headphones:

  • Cleaning: Use a soft, dry cloth to wipe the headphones. Do not use abrasive cleaners, alcohol, or chemical solvents.
  • Storage: When not in use, store the headphones in a cool, dry place, away from direct sunlight and extreme temperatures. Utilize the foldable design for compact storage.
  • Battery Care: To preserve battery life, avoid fully discharging the headphones frequently. Charge them regularly, even if not in constant use.
  • Water Exposure: These headphones are not waterproof. Avoid exposure to water, moisture, or rain.

Troubleshooting

If you encounter issues with your Siindoo JH-820 headphones, refer to the following common problems and solutions:

ProblemPossible CauseSolution
Headphones do not power on.Low battery.Charge the headphones fully using the provided Type-C cable.
Cannot pair with device.Headphones not in pairing mode; Bluetooth off on device; device too far.Ensure headphones are in pairing mode (flashing indicator). Turn Bluetooth on your device. Keep devices within 10 meters. Forget previous pairings on your device and try again.
No sound or distorted sound.Volume too low; incorrect audio source; loose AUX cable connection.Increase volume on both headphones and device. Ensure correct audio output is selected on your device. Re-insert AUX cable firmly if in wired mode.
Microphone not working.Microphone muted on device; app permissions.Check microphone settings on your device. Ensure the application has permission to access the microphone.
Intermittent connection.Interference; distance from device.Move closer to your device. Avoid strong electromagnetic interference.

Specifications

FeatureDetail
Model NameJH-820
Connectivity TechnologyWireless (Bluetooth 5.4), Wired (3.5mm AUX)
Bluetooth Version5.4
Bluetooth RangeUp to 10 meters (33 feet)
Audio Driver Size40 mm
Frequency Response20 Hz - 20000 Hz
Sensitivity105 dB
Impedance32 Ohm
Battery Life (Music Playtime)Up to 28 hours
Charging TimeApprox. 2-2.5 hours
Charging PortType-C
MicrophoneBuilt-in
EQ Modes3 (POP, Vocal, Bass)
Weight9.1 ounces (approx. 258 grams)
MaterialPlastic
Included ComponentsHeadphones, Type-C charging cable, AUX cable, User Manual

Warranty and Support

Warranty Information: Siindoo products are manufactured to high quality standards. For specific warranty terms and conditions, please refer to the warranty card included with your product or contact Siindoo customer support.

Customer Support: If you have any questions, concerns, or require technical assistance with your Siindoo JH-820 headphones, please contact our customer support team. Contact details can typically be found on the product packaging, the official Siindoo website, or through your point of purchase.

We are committed to providing excellent service and support for our products.

© 2025 Siindoo. All rights reserved.

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