What's in the box:

HIFI Power Amplifier Board Module 50Wx2 AUX and BT5.0 Audio Input Stereo Audio Treble Bass Control AMP (Standard)

This power amplifier is equipped with TPA3116D2, a high quality chip with AM avoidance. Its treble and bass control and volume control feature low distortion and wide adjustment range, delivering high performance and making it convenient to use.

Features:
Made of good materials, delivers high performance. A cost-effective power amplifier for HIFI music.
Employ TPA3116D2, a Class-D stereo amplifier IC with high performance. The modulation frequency can be up to 1.2MHZ, and >90% power efficiency combined with low idle loss greatly reduces heat sink size.
Equipped with BT 5.0, transmit farther and more efficiently.
With AUX and BT two ways of audio input, 2-in-1.
It has treble and bass adjustment, which can be controlled independently.
Integrated self-protection circuits including over-temperature, short circuit, over-voltage and under-voltage, DC detection.
Comes with DC lead, compatible with the power input interface of this product, even if you don't have a DC adapter or battery, it can be easily wired.

Specifications:
Material: ABS
Color: Black
Model: ZK-502T
Chip: TPA3116D2(with AM avoidance)
BT version: 5.0
Output power: 50W x 2
SNR: >90 dB
Audio Input: AUX + BT
Channel: 2.0(stereo)
Allowable supply voltage: DC9~24V / 2A higher (high power for high voltage)
Compatible speaker: 15W~100W, 4O~8O
Transmission distance: 10 meters (without barrier)
Protection measure: over-temperature, short circuit, over-voltage and under-voltage, DC detection.
Output Power: 15W*2 @12V,8O 30w*2 @12V,4O
20W*2 @19V,8O 40W*2 @19V,4O
30W*2 @24V,8O 50W*2 @24V,4O
Item Size: 11 * 7 * 2cm / 4.33 * 2.76 * 0.83in
Item Weight: 65g / 2.29oz
Package Weight: 155g / 5.46oz
Package Size: 13 * 8.3 * 4.5cm / 5.11 * 3.26 * 1.77in

Note:
Only when the audio input is sufficient and the power supply voltage/current is sufficient, will there be enough output power. The higher the power supply voltage, the higher the relative power. The speaker with different impedance will have different output power. In the case of sufficient voltage and current, the larger the ohm of speaker, the smaller the relative sound power.
Please make sure the supply power is greater than the actual working power of the amplifier.

Packing List:
1 * Amplifier Module
1 * Heat Sink
1 * Screwdriver
1 * DC lead
1 * Shell
1 * Knob