ZKMT21 2.1 Channel Sound Amplifier Module — 2x50W + 100W, Bluetooth 5.0, AUX, 12V/24V Key benefits Powerful, compact upgrade: Converts passive speaker sets into a full 2.1 system with clear left/right channels and a dedicated subwoofer output rated at 2x50W + 100W. Modern wireless connectivity: Builtin Bluetooth 5.0 lets you stream from phones, tablets, and other Bluetooth devices with stable pairing and low latency. Flexible installation: Works from common 12V or 24V power sources so it fits home, automotive, and portable projects without complex wiring. What it does for you Adds subwoofer impact and stereo separation to existing speakers so movies, music, and games feel fuller and more dynamic. Eliminates the need for separate amplifier and Bluetooth receiver components by combining digital amplification and wireless input on a single board. Provides both wireless and wired input options (Bluetooth and AUX) so you can connect modern devices and legacy sources. Key features and specifications Model: ZKMT21 Channel configuration: 2.1 channel (left, right, subwoofer) Rated output: 2 x 50W + 100W Wireless: Bluetooth 5.0 integrated Wired input: AUX input supported Power supply: Compatible with 12V or 24V systems Form factor: Digital power amplifier board (single module, 1pc) Compatibility and functionality Pair smartphones, tablets, and laptops via Bluetooth 5.0 for wireless audio streaming. Use the AUX input for TVs, media players, or devices without Bluetooth. Power from a 12V car battery, 12V/24V bench supply, or suitable DC adapter to support home or vehicle installations. Designed as a dropin amplifier board for DIY speaker projects, retrofit builds, and custom audio systems. Typical applications Home audio upgrade: Add Bluetooth streaming and subwoofer output to passive bookshelf or floorstanding speakers for improved movie and music playback. Car or small vehicle audio: or boost factory amplifiers using 12V/24V power to drive a 2.1 setup with a dedicated subwoofer channel. DIY speaker systems and kiosks: Compact amplifier board for hobbyist projects, custom enclosures, or multiroom audio prototypes. Installation notes (concise) Connect left and right speaker outputs and the subwoofer output to compatible passive speakers/subwoofer. Choose Bluetooth or AUX input as source; pair Bluetooth devices per standard pairing procedure. Supply regulated 12V or 24V DC power capable of meeting the amplifier's current demands. Follow basic wiring and safety practices: correct polarity, secure connections, and adequate ventilation during operation. Why choose the ZKMT21 Integrates modern Bluetooth 5.0 and a dedicated subwoofer channel into one digital amplifier board, simplifying upgrades and custom builds. Flexible 12V/24V power support makes it suitable for both home and vehicle environments. Delivers the rated 2x50W+100W outputs for clear stereo and robust lowfrequency performance without separate components. Includes 1pc ZKMT21 digital power amplifier module (2.1 channel, Bluetooth 5.0, AUX, 12V/24V) Note: This description reflects the ZKMT21 module's model, rated outputs, channel configuration, Bluetooth 5.0 capability, AUX input, and 12V/24V power compatibility as specified. Follow manufacturer guidance for safe installation and load matching.