TWOOC EH-2 Bicycle Electronic Horn Instruction Manual

1. Introduction

The TWOOC EH-2 Bicycle Electronic Horn is designed to enhance safety for cyclists by providing a loud warning sound. Its compact size, high decibel output, and waterproof design make it suitable for various cycling conditions and bike types.

TWOOC EH-2 Bicycle Electronic Horn mounted on a handlebar — The TWOOC EH-2 Bicycle Electronic Horn, featuring 120dB super volume and long battery life.

Small size, high decibel horn held in hands — The compact size of the EH-2 horn, emphasizing its small stature and high decibel output.

2. Setup and Installation

The TWOOC EH-2 horn is designed for easy, tool-free installation using flexible silicone straps. It is compatible with handlebars ranging from φ22.2mm to 31.8mm in diameter.

2.1 Battery Installation

Locate the battery compartment on the horn.
Carefully open the compartment.
Insert two CR2032 batteries, ensuring correct polarity (positive and negative directions indicated by the logo).
Close the battery compartment securely. For better waterproofing, the battery compartment is installed tightly; tools may be needed to remove it.

Close-up of the battery compartment of the TWOOC EH-2 horn — The battery compartment of the EH-2 horn, showing the 'OPEN' indicator.

2.2 Handlebar Mounting

Apply the anti-slip pad to the bottom of the horn product.
Fix one end of a silicone strap at the hook on the horn.
Place the horn (speakers facing forward) in the desired position on your handlebar.
Fix the strap at the other end of the hook to complete the installation. The strap is designed to adapt to different sizes and diameters of handlebars.

Hands installing the TWOOC EH-2 horn on a bicycle handlebar — Easy installation of the EH-2 horn on a handlebar, compatible with φ22.2-31.8mm bars.

Step 1: Applying the anti-slip pad to the horn — Installation Step 1: Apply the anti-slip pad to the bottom of the product.

Step 2: Fixing one end of the silicone strap to the horn — Installation Step 2: Fix one end of the strap at the hook.

Step 3: Placing the horn on the handlebar — Installation Step 3: Place the speakers in the right place on the handlebar.

Step 4: Securing the horn with the silicone strap — Installation Step 4: Fix the strap at the other end of the hook to complete the installation. The strap adapts to different handlebar sizes.

3. Operating Instructions

To operate the TWOOC EH-2 horn, simply press the button located on the top of the unit. The horn will emit a loud warning sound of up to 120dB, effectively alerting pedestrians and vehicles.

TWOOC EH-2 horn on a handlebar with a hand pressing the button — The EH-2 horn provides 120dB loud volume for effective warning.

Diagram showing sound propagation from the horn on a road — High-decibel warning sound effectively alerts pedestrians and vehicles, with sound levels of 85dB at 3 meters and 75dB at 5 meters.

3.1 Important Safety Notice

The electronic horn produces a very loud sound. To prevent unnecessary harm, avoid sounding the horn in narrow indoor spaces or directly towards ears.

3.2 Product Video Demonstration

Demonstration video showing the installation and operation of the TWOOC EH-2 Bicycle Electronic Horn in various cycling scenarios.

4. Maintenance

4.1 Battery Replacement

The horn is powered by two CR2032 batteries. When the sound becomes weak or the horn stops functioning, it's time to replace the batteries. We recommend using Panasonic batteries for longer life. Ensure the waterproof ring of the battery compartment is correctly installed after replacement to maintain its IPX4 rating.

4.2 Cleaning and Care

Wipe the horn with a soft, damp cloth to remove dirt and dust. Do not use harsh chemicals or abrasive cleaners. Ensure the horn is dry before storage or prolonged use.

4.3 Waterproofing

The horn has an IPX4 waterproof rating, meaning it is resistant to splashing water from any direction. It is suitable for daily outdoor use in rainy environments. However, it is not designed for submersion.

TWOOC EH-2 horn on a handlebar being splashed with water — The EH-2 horn is IPX4 waterproof, suitable for rainy day riding without worry.

5. Troubleshooting

Horn not sounding or weak sound: Check battery levels. Replace CR2032 batteries if necessary. Ensure batteries are inserted with correct polarity.
Horn not securely mounted: Re-adjust the silicone straps to ensure a tight fit on the handlebar. Verify the anti-slip pad is correctly positioned.
Water ingress: If the horn has been exposed to heavy rain or submerged, allow it to dry completely. Ensure the battery compartment's waterproof ring is properly seated after battery changes.

6. Specifications

Feature	Specification
Model Number	EH-2
Type	Electric Horn
Material	Engineering plastic
Size	76 x 44 x 36 mm
Weight	34g
Decibel	120dB
Waterproof Level	IPX4
Battery Type	2 x CR2032
Compatibility	Ordinary bicycle, Road bike, Mountain bike, Electric bike, Scooter, Children's scooter (Handlebar diameter φ22.2-31.8mm)

Image displaying product parameters for the TWOOC EH-2 horn — Product parameters for the EH-2 Bicycle Electronic Horn.

7. User Tips

For optimal battery life, consider carrying spare CR2032 batteries, especially on long rides.
Regularly check the horn's mounting to ensure it remains secure and does not shift during rides.
Position the horn where it is easily accessible for quick activation in emergency situations.
While IPX4 rated, avoid intentionally exposing the horn to heavy downpours or prolonged wet conditions to maximize its lifespan.

8. Warranty and Support

For any questions, technical support, or warranty claims, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.

TWOOC EH-2