1. Overview
The Docooler BENJIE K11 is a versatile digital MP3/MP4 player designed for portable media consumption. It features an 8GB internal memory, a 2.4-inch display, and supports various functions including music playback, video playback, FM radio, E-book reading, and voice recording. Its compact design and Bluetooth connectivity enhance user experience.

Image 1.1: Front view of the Docooler BENJIE K11 Digital Player, showing the screen and touch buttons.
Key Features:
- Multifunctional Digital Player: Supports Wireless Bluetooth Connection, Video Play, TF card music play, FM radio, E-book Reading, and Voice Recording.
- Wireless Bluetooth Connection: Connects wirelessly with Bluetooth-enabled headphones and speakers for audio playback.
- 2.4-inch Display Screen: Provides clear information display and convenient operation, including folder navigation and E-book reading.
- 8GB Internal Memory & TF Card Support: Built-in 8GB memory for storing media files, expandable up to 64GB via TF card.
- Compact and Durable Design: Small size for portability, featuring a metal shell for durability.
2. Setup
2.1 Package Contents
Before proceeding, ensure all items are present in the package:
- 1 x Docooler BENJIE K11 MP4 Player
- 1 x Micro USB Charging Cable
- 1 x Wired Earphone
- 1 x User Manual (English & Chinese)
2.2 Charging the Device
- Connect the Micro USB charging cable to the player's charging port.
- Connect the other end of the USB cable to a USB power adapter (not included) or a computer's USB port.
- The device will indicate charging status on the screen. A full charge typically takes approximately 2-3 hours.
2.3 Powering On/Off
- To Power On: Press and hold the Power button (usually located on the side) until the screen illuminates.
- To Power Off: Press and hold the Power button until the power-off prompt appears, then confirm.
2.4 Transferring Files
Files such as music, videos, and e-books can be transferred from a computer or Android mobile phone/tablet.
- Connect the player to your computer using the Micro USB cable. The player will appear as a removable disk.
- Drag and drop your desired files into the appropriate folders on the player (e.g., "Music" for audio, "Video" for videos, "E-book" for TXT files).
- For Android mobile phone/tablet transfer, an OTG adapter (purchased separately) is required. Connect the player to the mobile device via the OTG adapter and transfer files as needed.

Image 2.1: Illustrates connecting the player to a smartphone for file transfer using an OTG adapter.
2.5 Inserting a TF Card (Optional)
The device supports TF (Micro SD) cards up to 64GB for expanded storage.
- Locate the TF card slot on the side of the player.
- Gently insert the TF card into the slot until it clicks into place.
- To remove, push the card inward until it springs out.
3. Operating Instructions
3.1 Navigation and Controls
The BENJIE K11 features a 2.4-inch screen with touch buttons for navigation. The backlight for the touch buttons can be activated for use in low-light conditions.

Image 3.1: The player's backlight capacitive touch buttons illuminated for night operation.
- Use the directional touch buttons (up, down, left, right) to navigate through menus.
- The center button typically acts as a "Select" or "Confirm" button.
- The "Return" or "Back" button (often an arrow or 'U' shape) navigates to the previous screen.
- The "Menu" button (often three horizontal lines) accesses context-sensitive options.
- To activate the backlight, touch any of the capacitive buttons.
3.2 Music Playback
The player supports various audio formats including MP3, WMA, OGG, APE, FLAC, WAV, and AAC-LC.
- From the main menu, select "Music List".
- Browse through your stored music by artist, album, genre, or folder.
- Select a song to begin playback.
- During playback, use the touch buttons to control volume, skip tracks, or pause/play.

Image 3.2: The player supports high-fidelity music playback and various lossless formats.
Advanced Music Features:
- A-B Repeat: Allows repetition of a specific segment of a track. Select the start point (A) and end point (B) during playback.
- Variable Speed Playback: Adjust the playback speed of audio files (e.g., for learning or transcription).

Image 3.3: Demonstrates the A-B repeat and 8-level speed change functions for music playback.
3.3 Bluetooth Connection
Connect the player to Bluetooth headphones or speakers for wireless audio.
- From the main menu, select "BT" (Bluetooth).
- Ensure your Bluetooth headphones or speaker are in pairing mode.
- The player will scan for available devices. Select your device from the list to connect.
- Once connected, audio will stream wirelessly to your paired device.
3.4 Video Playback
The player supports video playback on its 2.4-inch screen.
- From the main menu, select "Video".
- Browse and select the video file you wish to play.
- Use the touch buttons for playback controls (play, pause, fast forward, rewind).
3.5 FM Radio
Listen to FM radio stations.
- From the main menu, select "FM Radio".
- Connect wired earphones, as they often act as the antenna for better reception.
- Use the menu options to scan for stations or manually tune to a frequency.
3.6 Voice Recording
The player includes a voice recording function with noise reduction.
- From the main menu, select "Recordings".
- Choose "Start Recording" to begin.
- Press the appropriate button to stop and save the recording.
- Recordings are saved in MP3 format.

Image 3.4: The player supports HD long-distance recording with intelligent noise reduction.
3.7 E-book Reading
Read TXT format e-books on the device.
- From the main menu, select "E-book".
- Browse and select the TXT file you wish to read.
- Use the directional buttons to scroll through pages.
- The player offers features like 4 eye-protection themes, 10-level brightness adjustment, and the ability to listen to music while reading.

Image 3.5: The player's e-book function with various reading backgrounds and brightness levels.
4. Maintenance
- Cleaning: Use a soft, dry cloth to clean the device. Avoid liquid cleaners or abrasive materials.
- Storage: Store the player in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: To prolong battery life, avoid fully discharging the battery frequently. Charge the device regularly, even if not in use for extended periods.
- Water Resistance: The device features an IPX4 splash-proof design, making it resistant to splashes. However, it is not fully waterproof and should not be submerged in water.

Image 4.1: The player features an IPX4 splash-proof design, suitable for outdoor use.
5. Troubleshooting
| Problem | Possible Solution |
|---|---|
| Device does not power on. |
|
| Cannot connect to Bluetooth device. |
|
| No sound from earphones. |
|
| Files not appearing on the device. |
|
| Screen is unresponsive or frozen. |
|
6. Specifications
| Feature | Detail |
|---|---|
| Brand | Docooler (BENJIE) |
| Model Number | K11 |
| Internal Memory | 8GB |
| Expanded Storage | TF Card up to 64GB |
| Display Screen | 2.4 inches LCD |
| Display Resolution | 128 x 64 |
| Audio Formats | MP3, WMA, DRM WMA, OGG, APE, FLAC, WAV, AAC-LC, ACELP |
| E-book Format | TXT |
| Recording Format | MP3 |
| Charging Port | Micro USB |
| Battery | Built-in 3.7V/600mAh rechargeable lithium battery (304050) |
| Connectivity Technology | USB, Bluetooth |
| Special Features | FM Radio, Video Playback, Voice Recorder, E-book Reader, Bluetooth |
| Item Size | Approx. 10.8 x 4.7 x 0.8 cm (4.25 x 1.85 x 0.31 in) |
| Item Weight | Approx. 62g (2.18oz) |
| Water Resistance | IPX4 Splash-proof |
7. Warranty and Support
7.1 Warranty Information
The Docooler BENJIE K11 MP3/MP4 Player typically comes with a 6-month warranty from the date of purchase. This warranty covers manufacturing defects under normal use. Please retain your purchase receipt as proof of purchase for warranty claims. The warranty does not cover damage caused by misuse, accidents, unauthorized repairs, or normal wear and tear.
7.2 Customer Support
For technical assistance, troubleshooting, or warranty inquiries, please contact your retailer or the Docooler customer support channel. Refer to the contact information provided with your purchase or visit the official Docooler website for support details.




