Ability to work with Bluetooth - AUX - USB - Memory card Built-in remote control and microphone Dial buttons to easily adjust settings such as echo, volume, and microphone Talking comfortably in incoming calls with a hands-free feature 8-inch x 2 Speaker size Radio feature Output power: 15W x 2 Frequency Response: 45Hz-18KHz S / N: 85 dB Battery Capacity: 4500 mAH Voltage: DC 5V QTY: 1 Set Weight: 4.1 kg. Slots: SD Card Inputs: USB / Aux / Mic Features: Colorful LED design on the body part Easy to use with remote control or Bluetooth Powerful and quality sound