1. Introduction
The Zoook 5-in-1 BluSense is a high-performance and stylish Bluetooth Headset that acts as a controller to your Smartphone/Tablet. This device enables any speaker-outfitted technology (headphones, earbuds, car stereos, home audio systems) with Bluetooth audio and hands-free calling capabilities. It allows you to use non-Bluetooth headphones wirelessly and take calls. The BluSense is compatible with various audio devices equipped with 3.5mm audio jacks and features a built-in rechargeable battery offering up to 7 hours of continuous audio playback.

Figure 1.1: Front view of the ZOOOK ZB-BTS51 Bluetooth Music Receiver.
2. Package Contents
Please verify that all items listed below are present in your package:
- 1 x ZOOOK 5-in-1 BluSense Bluetooth Music Receiver
- 1 x Corded Stereo Earphone
- 1 x USB Charging Cable
- 1 x AC Charger
- 1 x User Manual (this document)

Figure 2.1: All components included in the ZOOOK ZB-BTS51 package.
3. Product Features
- Compact Design: Super compact design for portability, with a built-in clip for attachment to clothing or bags.
- Bluetooth Connectivity: Adds Bluetooth-receiving capability to ordinary headphones, speakers, and other non-Bluetooth multimedia devices.
- On-board Controls: Integrated controls for Volume adjustment, Play/Pause, Next/Back track selection.
- Included Earbuds: Comes with a premium set of black Musicana ergonomic earbuds.
- Easy Pairing: Simple and quick pairing mode for connecting to your favorite devices.
- Extended Battery Life: Up to 7 hours of talk time or music playback, and up to 168 hours (7 days) of standby time. Full charge in 2 hours.
- Multipoint Connection: Supports connection to two phones simultaneously.
- Voice Dialing/Redialing: Features for convenient call management.
- Universal Compatibility: Equipped with a universal 3.5mm audio jack and micro USB charging contact.
- VOIP Support: Connects with computers for online chat.
- 5-in-1 Design: Compatible with RCA cable, 3.5mm to 2.5mm audio cable, car AUX, home hi-fi systems, and high-quality headphones.

Figure 3.1: The ergonomic earbuds included with the BluSense receiver.
4. Setup Guide
4.1. Charging the Device
- Connect the small end of the USB charging cable to the micro USB port on the BluSense receiver.
- Connect the larger end of the USB charging cable to the AC charger.
- Plug the AC charger into a standard wall outlet.
- The device will indicate charging status (e.g., an LED light). A full charge typically takes 2 hours.
- Once fully charged, disconnect the charger.
4.2. Pairing with a Bluetooth Device
- Ensure the BluSense receiver is charged.
- Turn on the BluSense receiver by pressing and holding the power button (usually the call button) until the indicator light flashes, indicating pairing mode.
- On your smartphone, tablet, or other Bluetooth-enabled device, go to the Bluetooth settings.
- Enable Bluetooth and search for available devices.
- Select "ZB-BTS51" or a similar name from the list of found devices.
- Once paired, the indicator light on the BluSense receiver will change (e.g., solid blue or slow flashing) and your device may confirm the connection.
- You can now connect your headphones or speakers to the BluSense receiver via the 3.5mm audio jack.

Figure 4.1: The BluSense receiver with earphones, showing the indicator light during operation.
5. Operating Instructions
5.1. Basic Controls
| Button/Action | Function |
|---|---|
| Power Button / Call Button (often the central button) |
|
| Volume Up / Next Track |
|
| Volume Down / Previous Track |
|
5.2. Wearing the Device
The BluSense receiver features a built-in clip, allowing you to conveniently attach it to your shirt collar, pocket, backpack strap, or other suitable locations for hands-free use.

Figure 5.1: Demonstrating how to clip the BluSense receiver for convenient use.

Figure 5.2: The BluSense receiver in use during outdoor activity.
6. Maintenance and Care
- Keep the device dry. Avoid exposure to moisture, rain, or liquids.
- Do not attempt to disassemble or modify the device. This will void the warranty.
- Clean the device with a soft, dry cloth. Do not use harsh chemicals or abrasive cleaners.
- Store the device in a cool, dry place away from extreme temperatures.
- Avoid dropping or subjecting the device to strong impacts.
7. Troubleshooting
| Problem | Possible Cause / Solution |
|---|---|
| Device does not power on. |
|
| Cannot pair with a Bluetooth device. |
|
| No sound or poor sound quality. |
|
| Voice not clear during calls. |
|
| Intermittent quirky sound. |
|
8. Specifications
| Feature | Detail |
|---|---|
| Brand | Zoook |
| Model Number | ZK-ZB-BTS51 |
| Connectivity Technology | Bluetooth V3.0 |
| Bluetooth Profiles | HFP/HSP/A2DP/AVRCP |
| Working Distance | Up to 30 feet (approx. 9 meters) |
| Compatible Devices | Headphones, Speakers, Smartphones, Tablets |
| Audio Output Mode | Stereo |
| Connector Type | 3.5mm Jack |
| Power Source | Battery Powered |
| Music Playback/Talk Time | Up to 7 hours |
| Standby Time | Up to 168 hours (7 days) |
| Charging Time | Approximately 2 hours |
| Item Weight | 110 g (0.24 lbs) |
| Microphone Format | Built-In |
9. Warranty and Support
The ZOOOK ZB-BTS51 Bluetooth Music Receiver comes with a 1 Year Limited Warranty from the date of purchase. This warranty covers manufacturing defects and workmanship under normal use.
For warranty claims, technical support, or any inquiries regarding your product, please contact Zoook customer service. Refer to the official Zoook website or your purchase documentation for the most current contact information.
Please retain your proof of purchase for warranty validation.