ZHIWHIS ZWS-727
ZHIWHIS Portable FM Digital Tuner User Manual
Model: ZWS-727
Introduction
Thank you for purchasing the ZHIWHIS Portable FM Digital Tuner. This compact and lightweight radio is designed for excellent FM reception and ease of use, making it ideal for various activities such as walking, camping, or simply enjoying music at home. Please read this manual thoroughly before operating the device to ensure proper use and to maximize its performance.
Package Contents

The image displays the complete set of items you will find in the product packaging. This includes the main portable radio unit, a pair of stereo earphones for private listening, a user manual for detailed instructions, a neck lanyard for convenient carrying, a hand strap for secure grip, and a waterproof storage bag to protect your device.
- ZHIWHIS Portable FM Digital Tuner (Model: ZWS-727)
- Stereo Earphones (3.5mm jack)
- Neck Lanyard
- Hand Strap
- Waterproof Storage Bag
- User Manual
Product Features

This image demonstrates the compact and mini size of the ZHIWHIS portable radio, easily fitting into the palm of one hand. Its small form factor makes it highly portable and convenient for on-the-go use.

The image provides a detailed view of the radio's dimensions, indicating its length as 3.14 inches, width as 1.1 inches, and height as 0.78 inches. It also points out the 3.5mm earphone jack and the clear LCD display, emphasizing its portable design and key interface elements.
- DSP Digital Processing Technology: Ensures stable and clear FM signal reception.
- Wide Frequency Range: 64-108 MHz FM band.
- Stereo Sound: Enjoy high-quality stereo audio through the included earphones.
- Preset Stations: Stores up to 30 FM radio stations.
- Automatic & Manual Scan: Two methods for station searching and storage.
- Power-Off Memory Function: Retains saved stations even after battery replacement.
- Digital Clock & Sleep Timer: Convenient time display and auto shut-off feature (10-120 minutes).
- Lock Button Function: Prevents accidental operation.
- Ultra-Portable Design: Compact size (3.14 x 1.1 x 0.78 inches) and lightweight (0.09 lb).
- Battery Operated: Requires 2 x AAA batteries (not included).
Setup
1. Battery Installation

This image illustrates the open battery compartment of the ZHIWHIS portable radio, clearly showing the slots for two AAA batteries. Ensure correct polarity when inserting the batteries as indicated inside the compartment.
- Locate the battery compartment cover on the back of the radio.
- Slide the cover downwards to open it.
- Insert 2 x AAA batteries (not included) into the compartment, ensuring the correct polarity (+ and -) as marked.
- Close the battery compartment cover by sliding it upwards until it clicks into place.
2. Connecting Earphones
The 3.5mm earphones serve as both the audio output and the FM antenna for the radio. It is essential to connect the earphones for proper reception.
- Insert the 3.5mm jack of the stereo earphones firmly into the earphone port on the radio.
Operating Instructions

This image provides a clear diagram of the radio's control buttons and their respective functions. It labels the 'MODE' button for mode switching and automatic station search, the 'Power' button for turning the device on/off, the 'MEM' button for managing saved stations, and the '+' and '-' buttons for volume adjustment and channel selection. The LCD display screen is also highlighted.
1. Power On/Off
- Press the Power button (
) to turn the radio on or off.
2. Volume Adjustment
- In normal listening mode, press the + button to increase volume.
- Press the - button to decrease volume.
- The volume level will be displayed on the LCD screen.
3. Tuning Stations
Automatic Station Search and Storage (ATS)
- Long press the MODE button. The radio will automatically scan for available FM stations and save them to memory.
- The scanning process will stop once all stations are found and saved.
Manual Station Search
- Short press the MODE button to switch to frequency tuning mode.
- Short press the + button or - button to fine-tune the frequency step by step.
- Long press the + button or - button to automatically search for the next available station.
4. Saving and Recalling Preset Stations
Manual Save Memory Station
- Tune to your desired station using manual or automatic search.
- Long press the MEM button. The display will show "PXX" (XX being the preset number).
- Use the + button or - button to select the desired preset number.
- Short press the MEM button again to confirm and save the station.
Acquire Saved Stations Channels
- Short press the MEM button to cycle through your saved preset stations.
5. Sleep Timer Function
- While the radio is on, long press the Power button.
- The display will show the sleep timer setting (e.g., "SLP 10" for 10 minutes).
- Short press the + button or - button to adjust the sleep timer duration (10-120 minutes).
- The radio will automatically turn off after the set time.
6. Lock Button Function
- To prevent accidental button presses, slide the lock switch (usually on the side of the radio) to the "Lock" position.
- To unlock, slide the switch back to the "Unlock" position.
Maintenance
- Cleaning: Use a soft, dry cloth to clean the radio's surface. Do not use abrasive cleaners or solvents.
- Storage: If the radio will not be used for an extended period, remove the batteries to prevent leakage and damage. Store in a cool, dry place.
- Water Resistance: The radio is not waterproof. Avoid exposure to water or high humidity. The included storage bag offers some protection against splashes.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Batteries are dead or incorrectly inserted. | Replace batteries with new ones, ensuring correct polarity. |
| Poor reception / Static | Earphones not fully inserted or acting as antenna. Weak signal area. | Ensure earphones are fully plugged in. Try adjusting the position of the radio or earphones. Move to an area with better FM signal. |
| No sound | Volume too low. Earphones faulty. | Increase volume using the '+' button. Try a different pair of 3.5mm earphones. |
| Buttons unresponsive | Lock function is enabled. | Slide the lock switch to the "Unlock" position. |
| Saved stations lost | This model has power-off memory. If stations are lost, it might indicate a rare software glitch or prolonged power loss. | Rescan and save stations. If the issue persists, contact customer support. |
Specifications
| Model Number | ZWS-727 |
| Frequency Range | FM: 64-108 MHz |
| Power Source | 2 x AAA Batteries (not included) |
| Audio Output | 3.5mm Earphone Jack |
| Dimensions (L x W x H) | 3.14 x 1.1 x 0.78 inches (8 x 2.8 x 2 cm) |
| Weight | 0.09 lb (0.81 ounces / 23 grams) |
| Display | LCD Digital Display |
| Preset Stations | Up to 30 FM stations |
Warranty and Support
ZHIWHIS provides a full 12-month guarantee for this product. If you encounter any questions or issues, please do not hesitate to contact our customer service team. We are committed to providing a satisfactory solution.
For support, please refer to the contact information provided on the product packaging or the official ZHIWHIS website.
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