Introduction
The iClever BTH20 Active Noise Cancelling Headphones are specifically designed to provide a safe, comfortable, and high-quality audio experience for children. These headphones incorporate advanced noise reduction technology, volume limiting features to protect young ears, and a durable construction to withstand daily use and travel. This manual provides essential information on setting up, operating, maintaining, and troubleshooting your BTH20 headphones.
What's in the Box
- iClever BTH20 ANC Kids Headphones
- USB-C Charging Cable
- Detachable 3.5mm Audio Cable
- Protective Case
- User Manual
Product Features
- Excellent Noise Reduction Performance: These headphones feature two noise reduction modes (active + passive) with a maximum depth of 40dB. The low noise reduction mode offers gentler ear pressure, while the high mode blocks out most engine and mechanical noises for an immersive experience. Note: Active Noise Cancellation (ANC) is not available for wired connections.
- Strong Durability: Crafted from BPA and PVC-free enhanced materials, these headphones offer over twice the wear and impact resistance of traditional materials. The reinforced internal structure ensures button longevity and prevents sound loss on one side.
- Comfortable to Wear: Designed with a pressure-reducing, skin-like texture, the BTH20 ensures comfortable wear during travel. The 90° rotatable earmuffs and 10-level adjustable headband provide a perfect fit for kids aged 3 and up, with large buttons for easy operation.
- Safer Listening: Utilizing iClever Sound Refiner and 80dBA volume limit technology, these headphones effectively reduce volume in the most vulnerable hearing frequency range (2K-4KHz) while delivering clear and balanced sound quality.
- Long-Lasting Battery Life: Bluetooth 5.4 ensures a stable connection and lower power consumption, providing up to 60 hours of playtime with ANC off, or 35 hours with ANC on. A quick 10-minute Type-C fast charge provides 5 hours of use, and the included 3.5mm audio cable offers a wired backup.
Setup
Charging the Headphones
Before first use, fully charge the headphones. Connect the provided USB-C charging cable to the charging port on the headphones and to a compatible USB power source. A full charge takes approximately 2 hours. A 10-minute fast charge provides up to 5 hours of playback.
Power On/Off
Locate the power button on the headphone earcup. Press and hold the power button for a few seconds to turn the headphones on or off.
Bluetooth Pairing
With the headphones powered on, they will automatically enter pairing mode. On your device (e.g., smartphone, tablet, laptop), enable Bluetooth and search for 'iClever BTH20' in the list of available devices. Select it to connect. The headphones utilize Bluetooth 5.4 for a stable connection up to 10 meters.
Wired Connection
For wired use, connect the detachable 3.5mm audio cable to the headphone's audio jack and to your audio source. This is useful when battery is low or for devices without Bluetooth. Note: ANC functionality is disabled when using a wired connection.
Operating Instructions
Volume Control
Use the dedicated volume buttons (+ and -) on the headphone earcup to adjust the listening volume. The iClever BTH20 features an 80dBA volume limit to protect children's hearing.
Active Noise Cancellation (ANC) Modes
The headphones offer two noise reduction modes: a low mode for gentler ear pressure and a high mode for blocking out significant ambient noise. Toggle between these modes using the ANC button. Voice prompts will indicate the current mode.

Figure 1: Hybrid Active Noise Cancelling technology with dual microphones for deeper noise reduction.
Wearing the Headphones
Adjust the headband to fit comfortably on the user's head. The earmuffs can rotate 90 degrees to ensure a proper seal and comfort, especially during extended use or travel.
Figure 2: The iClever BTH20 headphones featuring dual noise reduction modes for various environments.
Maintenance
Cleaning
Wipe the headphones with a soft, dry cloth. Avoid using harsh chemicals or abrasive materials. Ensure no liquids enter the ports or speaker grilles.
Storage
When not in use, store the headphones in the provided protective case. The foldable design allows for compact storage, protecting them from dust and damage. Avoid storing in extreme temperatures or humid environments.
Figure 3: The iClever BTH20 headphones are designed with kid-proof durability and are BPA-free.
Troubleshooting
- No Power: Ensure the headphones are fully charged. Connect to a power source using the USB-C cable.
- Cannot Pair via Bluetooth: Make sure Bluetooth is enabled on your device and the headphones are in pairing mode. Try turning both devices off and on again. Ensure the headphones are not already connected to another device.
- No Sound/Low Volume: Check the volume levels on both the headphones and the connected device. If using a wired connection, ensure the cable is fully inserted and undamaged.
- ANC Not Working: Remember that Active Noise Cancellation (ANC) is not available when the headphones are connected via the 3.5mm audio cable. Ensure the ANC toggle is correctly activated.
- Buttons Unresponsive: The buttons are designed for durability. If unresponsive, try restarting the headphones.
Specifications
| Feature | Detail |
|---|---|
| Model Name | BTH20 |
| Noise Control | Active Noise Cancellation |
| Connectivity Technology | Wired, Wireless (Bluetooth 5.4) |
| Headphones Jack | 3.5 mm Jack |
| Audio Driver Size | 40 Millimeters |
| Impedance | 32 Ohm |
| Frequency Range | 20Hz - 20,000Hz |
| Battery Life (ANC Off) | 60 Hours |
| Battery Life (ANC On) | 35 Hours |
| Charging Time | 2 Hours |
| Bluetooth Range | 10 Meters |
| Item Weight | 220 Grams (7.8 ounces) |
| Product Dimensions | 5.7 x 3 x 5.1 inches |
| Material | ABS, Leather, POK (BPA/PVC-free) |
| Water Resistance Level | Not Water Resistant |
Warranty & Support
For detailed warranty information and customer support, please refer to the full user manual included in your product packaging or visit the official iClever website. You can also access the User Manual (PDF) for comprehensive instructions and support details.





