JHE42B-S V2 Autonomous Buzzer for Drone Search — a compact and lightweight module for quickly locating a quadcopter in case of main power loss. Manufacturer: China. The device is designed for audible and visual indication after the main battery loses power and will be a reliable assistant when searching for a drone in difficult conditions.

Operation and Connection Description

JHE42B-S V2 is a board that combines a buzzer, an LED, and a built-in 3.7V battery. The power leads (red and red) connect to the quadcopter's 5V BEC, and the green wire connects to the controller's BUZZ pin for manual buzzer control. Version V2 adds an extra LED for improved visual status indication. 30 seconds after power disconnection, the device automatically activates audible and visual alarms; it can be turned off by pressing and holding the button for 2 seconds.

Advantages and Compatibility

• Compatible with Betaflight, Cleanflight, and other flight controllers, functions as a standard buzzer.
• Connects to any controller with BUZZ output and 5V BEC.
• After a crash and power loss, the buzzer emits audible signals and flashes bright white light after 30 seconds.
• The built-in battery automatically charges while the module is connected to the quadcopter's 5V power; the built-in LED glows red during charging.

Technical Specifications

• Features: Built-in battery and LED (V2 version with additional indicator).
• Battery life: up to 3 hours.
• Volume: 110 dB.
• Built-in battery: 75 mAh, 3.7 V, 0.2 W LiPo.
• Size: 18 x 17 x 15 mm.
• Weight: 4.3 g.

Package Contents

1 x Buzzer
1 x 3P 1.0mm cable

Where to Use

The JHE42B-S V2 autonomous buzzer is ideal for miniature and lightweight quadcopters where weight and compactness are critical. The device provides reliable audible and visual indication upon loss of connection or power, significantly facilitating drone search after an emergency landing or touchdown in dense terrain.

Other technical and practical details: connection to 5V BEC provides simultaneous power and charging of the built-in battery, the additional V2 LED provides improved visual status indication (activation, charging, operation), and simple control logic (automatic start after 30 s and shutdown by pressing the button for 2 s) makes the device easy to use even for beginners.

Product Category: Drones & Quadcopters > Drone Components > Drone Parts

Product Type: Drones & Quadcopters > Drone Accessories

Brand: China

The JHE42B-S V2 autonomous buzzer is a simple and effective solution to increase the chances of quickly regaining control of the model after an incident: it charges when connected, indicates status with a red indicator, automatically starts after 30 seconds, and operates for up to 3 hours, emitting a 110 dB signal.

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