Features: Brand new and high quality Support any adjustment of custom 10-segment sound effects to make up for the deficiencies, so that different speakers can achieve better sound effects. 360-degree stepless tuning. Exquisite appearance, small size. Protection mechanism: overcurrent, short circuit, anti-static protection. Support Wuzhi Audio APP. Modify and change the bluetooth name, password setting, volume adjustment of prompt sound, on/off prompt sound, sleep aid, sound effect selection + custom sound effect, U disk playlist. Specifications: Model: ZK-F152 Name: 2.0 Channel 15WX2 Stereo Bluetooth Audio Power Amplifier Bluetooth version: 5.1 Audio input: Bluetooth+AUX+U disk+USB sound card Audio output: left channel 15W + right channel 15W Adapter power supply: 9-24V Adapter speaker: 5-30w, 4-8 Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x ZK-F152 Cool Volume Indicator Bluetooth Audio Amplifier Board Module 2.0 Dual Channel 15W+15W