1. Introduction
The Inwa MZ-508 is a versatile portable Bluetooth speaker designed for outdoor enthusiasts, particularly cyclists. It features Bluetooth 5.0 connectivity, an integrated cycling speed display, hands-free calling, and an IP67 waterproof and dustproof rating. With its durable design and long-lasting battery, it provides high-quality audio and essential information on the go.
Key Features:
- Bluetooth 5.0 for stable wireless transmission up to 10 meters.
- Integrated cycling speed display.
- 8W high-power audio with 45mm suspension resonance full-frequency internal magnetic horn for dynamic sound and heavy bass.
- IP67 waterproof and dustproof rating, resistant to rain, wind, sand, and daily falls.
- Built-in 2200mAh high-performance lithium battery for up to 10 hours of working time.
- Hands-free calling with one-click answering.
- Support for Micro SD (TF) card plug and play for audio playback.
- Type-C interface for intelligent, stable, and fast charging.
- Portable hook design for easy attachment to backpacks, waistbands, or bicycles.
2. Package Contents
Please check the box for the following items:
- 1 x MZ-508 Host (Speaker)
- 1 x 0.6m USB Charging Cable
- 1 x Speaker Clip (Carabiner)
- 1 x User Manual
3. Product Overview
Familiarize yourself with the speaker's buttons and interfaces:

Button Functions:
- Power Button: Long press to power on/off.
- Play/Pause/Call/Pair Button: Short press to play/pause music. Short press to answer/end an incoming call. Long press to enter Bluetooth pairing mode.
- Volume Down / Previous Track Button (-): Long press to decrease volume. Short press to go to the previous track.
- Volume Up / Next Track Button (+): Long press to increase volume. Short press to go to the next track.
- Switch/Mode Switch Button: Short press to switch between modes (e.g., Bluetooth, TF card).

4. Setup
4.1 Charging the Speaker
- Connect the provided Type-C USB charging cable to the speaker's charging port.
- Connect the other end of the cable to a 5V/1A USB power adapter (not included) or a computer's USB port.
- The display will indicate charging status. A full charge typically takes 2-4 hours.
4.2 Mounting on a Bicycle
The MZ-508 speaker comes with a bicycle mount for easy attachment to your handlebars.
- Securely attach the bicycle mount to your handlebar.
- Slide the speaker onto the mount until it clicks into place.
- Ensure the speaker is firmly attached before riding.

5. Operating Instructions
5.1 Power On/Off
- Power On: Long press the Power button until the display lights up.
- Power Off: Long press the Power button until the display turns off.
5.2 Bluetooth Pairing
- With the speaker powered on, long press the Play/Pause/Call/Pair button to enter Bluetooth pairing mode. The display will show a pairing indicator.
- On your mobile device, enable Bluetooth and search for available devices.
- Select "MZ-508" from the list to connect. Once connected, the speaker will indicate successful pairing.

5.3 Music Playback
- Play/Pause: Short press the Play/Pause/Call/Pair button.
- Volume Control: Long press the '+' button to increase volume, long press the '-' button to decrease volume.
- Next Track: Short press the '+' button.
- Previous Track: Short press the '-' button.
5.4 Hands-free Calling
When the speaker is connected to your mobile phone via Bluetooth and there is an incoming call:
- Answer Call: Short press the Play/Pause/Call/Pair button.
- End Call: Short press the Play/Pause/Call/Pair button during a call.

5.5 TF Card Playback
Insert a Micro SD (TF) card with pre-stored audio files into the designated slot. The speaker will automatically detect the card and switch to TF card playback mode. Use the music playback controls to manage your audio.
5.6 Mode Switching
Short press the Switch/Mode Switch button to cycle through available modes (e.g., Bluetooth, TF Card, Radio if supported).
5.7 Cycling Speed Display
When mounted on a bicycle and in motion, the MZ-508 speaker's display will show your cycling speed. No specific setup is required for this function beyond proper mounting.

6. Specifications
| Feature | Specification |
|---|---|
| Product Number | MZ-508 |
| Bluetooth Version | Bluetooth 5.0 |
| Wireless Distance | ≤10m |
| Horn Size | φ45mm |
| Working Hours | 10h |
| Standby Time | ≥300hr |
| Frequency Response | 20Hz-20KHz |
| Charging Time | 2-4h |
| Operating Voltage | 5V/1A (DC 5V) |
| Rated Power / PMPO | 8W |
| Waterproof Level | IP67 |
| Battery Capacity | 2200mAh |
| Weight | 400g |
| Dimensions (H x W x D) | 97mm x 48mm x 112mm |
| Cabinet Material | Plastic |
| Display Screen | Yes |
| Support APP | Yes |
| Support Memory Card | Yes (Micro SD / TF Card) |
| Certification | CE, RoHS |
7. Maintenance
- Cleaning: Wipe the speaker with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners.
- Waterproof Care: Although the speaker is IP67 waterproof, ensure the charging port and TF card slot covers are securely closed before exposure to water or dust. Avoid prolonged submersion.
- Storage: Store the speaker 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 it regularly, even if not in use for extended periods.

8. Troubleshooting
Common Issues and Solutions:
- Speaker does not power on:
- Ensure the battery is charged. Connect the speaker to a power source and try again after a few minutes.
- Long press the Power button for 3-5 seconds.
- Cannot pair with Bluetooth device:
- Ensure the speaker is in Bluetooth pairing mode (long press Play/Pause/Call/Pair button).
- Make sure Bluetooth is enabled on your device and it is within 10 meters of the speaker.
- Forget the device from your phone's Bluetooth settings and try pairing again.
- Restart both the speaker and your Bluetooth device.
- No sound or low volume:
- Increase the volume on both the speaker and your connected device.
- Ensure the speaker is properly connected via Bluetooth or TF card.
- Check if the audio source is playing.
- TF card not recognized:
- Ensure the TF card is inserted correctly.
- Check if the audio files on the card are in a supported format (e.g., MP3).
- Try using a different TF card to rule out card issues.
9. User Tips
- For optimal cycling experience, ensure the speaker is securely mounted and fully charged before your ride.
- To maximize battery life, turn off the speaker when not in use.
- The portable hook design allows for versatile carrying options beyond just bicycles, such as backpacks or belt loops.
- Take advantage of the hands-free calling feature for safe communication while cycling.
10. Warranty and Support
For warranty information, technical support, or any product-related inquiries, please refer to the specific warranty card included with your purchase or contact the seller/manufacturer directly through their official channels. Keep your proof of purchase for any warranty claims.