---
product_id: 579530647
title: "ZK-R21E cool volume indicator Bluetooth power amplifier board module 2.1 channel subwoofer TPA3116 50WX2+100W"
brand: "dhruvpro"
price: "€ 56.89"
currency: EUR
in_stock: true
url: https://www.desertcart.fi/products/579530647-zk-r21e-cool-volume-indicator-bluetooth-power-amplifier-board-module
store_origin: FI
region: Finland
---

# Bluetooth + AUX + USB + U disk input 200W total output power 360° stepless volume knob with indicator ZK-R21E cool volume indicator Bluetooth power amplifier board module 2.1 channel subwoofer TPA3116 50WX2+100W

**Brand:** dhruvpro
**Price:** € 56.89
**Availability:** ✅ In Stock

## Summary

> 🎵 Elevate your sound game with power, precision, and style!

## Quick Answers

- **What is this?** ZK-R21E cool volume indicator Bluetooth power amplifier board module 2.1 channel subwoofer TPA3116 50WX2+100W by dhruvpro
- **How much does it cost?** € 56.89 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/579530647-zk-r21e-cool-volume-indicator-bluetooth-power-amplifier-board-module)

## Best For

- dhruvpro enthusiasts

## Why This Product

- Trusted dhruvpro brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart App Integration:** Customize Bluetooth name, password, sound effects, and brightness via Wuzhi Audio APP
- • **Precision Volume Control:** 360-degree stepless knob with volume level indicator for flawless sound tuning
- • **Immersive 2.1 Channel Powerhouse:** 50W left + 50W right + 100W subwoofer for rich, room-filling sound
- • **Robust Protection & Cool Indicator:** Over-temperature, over-current, short circuit, and anti-static safeguards with stylish volume indicator
- • **Seamless Multi-Source Connectivity:** Bluetooth, AUX, USB, and U disk inputs keep your playlists flowing effortlessly

## Overview

The ZK-R21E is a compact yet powerful 2.1 channel Bluetooth amplifier delivering 200W total output (50W+50W+100W subwoofer). It supports multiple audio inputs including Bluetooth, AUX, USB, and U disk, and features a 360° stepless volume knob with a cool volume indicator. Enhanced by the Wuzhi Audio APP, users can customize sound effects, Bluetooth settings, and brightness. Built-in protections ensure durability and reliability, making it a perfect upgrade for audiophiles seeking high-definition sound with smart control.

## Description

ZK-R21E cool volume indicator Bluetooth power amplifier board module 2.1 channel subwoofer TPA3116 50WX2+100W

## Features

- Model: ZK-R21E Name: 2.1 channel 50W+50W+100W subwoofer stereo bluetooth audio power amplifier
- Audio input: Bluetooth+AUX+U disk+USB sound card Audio output: left channel 50W + right channel 50W + subwoofer 100W
- Adapter power supply: DC9-24V, ≥7A (can not be connected to AC) Adapter speakers: left and right channels 15-50W, 4-8Ω; subwoofer 30-100W, 4-8Ω
- Volume adjustment: multi-function knob, 360-degree stepless tuning, with volume level indication. Click: Play/Pause
- Double click: mode switch (Bluetooth/U disk/AUX) Press and hold for 1 second: turn on/off Rotate: adjust the volume
- Cool indicator with high-definition sound quality
- Features: Support wuzhi Audio APP. Modify the bluetooth name, password settings, prompts Sound volume adjustment, on/off prompt sound, sleep aid, sound effect selection + custom sound effect, U disk playlist, volume indicator brightness adjustment.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | DHRUVPRO |
| Manufacturer | ZK-R21E |
| Country of Origin | China |
| Model number | XY-AP15H 50WX2+100W |
| Number of Memory Sticks | 1 |
| Speaker Surround Sound Channel Configuration | 2.1 |
| Item Weight | 199 g |
| Package Dimensions | 16 x 10 x 8 cm; 199 g |
| Item model number | XY-AP15H 50WX2+100W |
| Channels | Stereo |
| Connectivity Technology | Bluetooth |
| Compatible Device | Multiple Devices: Smartphones, Tablets, Computers, Music Players |
| Included Components | 1 |
| Maximum Speaker Output Power | 2E+2 Watts |

## Product Details

- **Brand:** DHRUVPRO
- **Model Name:** ZK-R21E
- **Manufacturer:** ZK-R21E

## Images

![ZK-R21E cool volume indicator Bluetooth power amplifier board module 2.1 channel subwoofer TPA3116 50WX2+100W - Image 1](https://m.media-amazon.com/images/I/51itfAq899L.jpg)

## Frequently Bought Together

- DHRUVPRO ZK-R21E Cool Volume Indicator Bluetooth Power Amplifier Board Module 2.1 Channel subwoofer TPA3116 50WX2+100W
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**Shop now:** [https://www.desertcart.fi/products/579530647-zk-r21e-cool-volume-indicator-bluetooth-power-amplifier-board-module](https://www.desertcart.fi/products/579530647-zk-r21e-cool-volume-indicator-bluetooth-power-amplifier-board-module)

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-03*