Mini Bluetooth Digital Amplifier HiFi TPA3116 50W*2 USB/AUX Input

• Bluetooth 5.0 Lossless Transmission: Enjoy stable, long-distance connectivity (up to 12m) with compatibility across 99% of devices.

• Multi-Functionality: Use it as a power amplifier or a PC sound card (supports Windows systems).

• Compact & Stylish Design: Small yet powerful, the amplifier features an integrated plastic case with a smooth LED display for a sleek, modern look.

• Multiple Inputs: Supports AUX, USB, and Bluetooth inputs. The USB port works with both computers (no driver required) and phones (with OTG function).

• Hi-Fi Sound Clarity: Delivers powerful, noise-free audio with optimized circuitry and a maximum output power of 50W*2, driving most home speakers effortlessly.

• Bluetooth Version: 5.0 (12m range)

• Audio Inputs: AUX, USB, Bluetooth

• Output Power: 50W*2 (24V/4Ω load)

• Speaker Impedance: 4Ω-16Ω

• Frequency Response: 20Hz-20KHz (±1dB)

• Power Supply: DC 9V-24V (reverse polarity protection)

• Size: 90mm x 50mm x 110mm (3.5 in x 1.9 in x 4.3 in)

• Weight: 220g

Vol Control/Power ON/OFF: This is the main knob. Turning it clockwise increases the volume, and counter-clockwise decreases it. Pressing and holding it for a few seconds turns the device on.

Screen: Displays information like the current playback mode (Bluetooth, USB, TF card), song number, and volume level.

TF Card Input: This slot accepts microSD cards (up to 64GB) for playing music directly from the card.

U-Disk/PC-USB: This USB port can be used to connect a USB flash drive (U-disk) with music files or to connect the amplifier to a computer for audio output.

AUX In: This 3.5mm audio jack allows you to connect external audio sources like smartphones, MP3 players, or computers.

Last Song/Play/Stop/Next Song: These buttons control playback. Pressing "Last Song" goes to the previous track, "Play/Stop" toggles between play and pause, and "Next Song" goes to the next track.

Mode Switch: This button cycles through the different playback modes: Bluetooth, USB, TF card, and AUX.

• Line in (RCA): This is where you connect the audio output from your source device (like a CD player, TV, or computer) using RCA cables. The red plug is for the right channel and the white plug is for the left channel.

• Speaker Outputs: These are the terminals where you connect your speakers. The right speaker connects to the "+" and "-" terminals labeled "Right Speaker," and the left speaker connects to the "+" and "-" terminals labeled "Left Speaker." The speaker impedance range is 4-16 ohms.

• Power Supply: This is where you connect the DC power supply (9-24V) to power the amplifier.

In summary, this side of the amplifier provides the necessary connections for audio input, speaker output, and power supply.

• Height: 5cm (1.96 inches)

• Width: 11cm (4.33 inches)

• Depth: 9cm (3.54 inches)

These dimensions provide a good idea of the size and portability of the amplifier.