Wendry Bluetooth Amplifier Board 5.0 - Compact 2x5W Module

In this review the Wendry Bluetooth Amplifier Board is judged as a compact, developer-friendly audio module for DIY speakers and portable projects. It is best for hobbyists and makers who need a small dual 5W amplifier with Bluetooth 5.0 and simple power switching; the single biggest reason to buy is the board's flexible power range and external output that lets users run the built-in amp or feed an external power amplifier for higher output. The review focuses on real-world use with small lithium battery rigs and basic control via external buttons.

Key Features

• Bluetooth 5.0: Modern wireless connectivity provides more stable streaming and lower latency for mobile and embedded audio sources.
• Dual 5W output: Configurable maximum power of 10W (5W per channel) offers usable volume for small desktop or portable speakers.
• Wide supply compatibility: Runs from DC 3.7V to 5V so it can be powered directly from a single-cell lithium battery or USB power bank.
• External amplifier output: An OUT 3P block lets advanced users route the preamp to a separate amplifier for higher-power systems.
• Micro power switch and buttons: On-board switch control and hands-calling/external button support make integration into cases and enclosures straightforward.
• Battery charging via USB: The module supports USB charging of a connected lithium battery and indicates charge status with a red LED.

Who It's For

This board is aimed at electronics hobbyists, makers building compact Bluetooth speakers, and small product developers who need a ready-made PCBA with Bluetooth 5.0 and basic power management. It suits projects where space is limited and where 5W per channel is adequate for near-field listening.

It is not intended for audiophiles seeking high-power home theater amplification or heavy-duty continuous output; those users should look for purpose-built higher wattage amplifiers and full-featured DACs. Similarly, beginners who need a plug-and-play consumer speaker may find the wiring and battery charging details require some technical comfort.

Pros & Cons

Pros

• Compact PCB design makes it easy to fit into small enclosures for custom speakers or portable projects.
• Bluetooth 5.0 provides a reliable wireless link and better compatibility with modern devices.
• External OUT terminal allows upgrading to a separate power amplifier without replacing the module.
• USB charging and an LED charge indicator simplify battery-powered builds.

Cons

• Maximum delivered power is modest at 5W per channel, so it is not suitable for loud, large-room setups.
• Documentation and packaged accessories are minimal, so some wiring and setup require basic electronics experience.

Specifications

Bluetooth	5.0
Voltage	DC 3.7V - 5V
Current	1.5A - 2A recommended
Output power	2 x 5W (configurable max 10W)
PCBA size	approx. 40 x 34 x 9mm (including terminal)
Charging input	USB (red LED charges, off when full)

Our Verdict

The Wendry Bluetooth Amplifier Board is a practical choice for makers and small-product developers who need a compact, battery-friendly Bluetooth 5.0 amp with external output options. It delivers good value when you need simple controls, USB charging, and the ability to feed a larger amplifier, but it is best used in near-field or portable speaker designs rather than high-power home audio systems.

Frequently Asked Questions

Can this board charge a lithium battery?
Yes, it supports USB charging of a connected lithium battery and shows a red light while charging and no light when charged.

Can I use a power bank with this module?
Yes, the board runs from 3.7V to 5V and will work with a 5V USB power bank, provided the bank can supply 1.5A to 2A or higher.

Is the audio output upgradeable to a bigger amplifier?
Yes, the 3P OUT terminal provides an external output path so you can feed a separate power amplifier for higher output.