This loudspeaker is made of materials and can withstand long-term use. Plastic material, durable and not easily deformed. Fine workmanship and strong practicability. Features -Color: Black -Material: Plastic -Size: 10.00X8.00X3.50cm/3.93X3.14X1.38in -Transmission distance: 100m -Peak output power: 5W -Output impedance: 2 -Output power: DC 5V 500mA -Frequency response: 180Hz-18kHz -Playing time: ≈15 hours -Special design, fine workmanship. It is the best substitute for your old, broken one. -Stable characteristics, high performance, strong reliability, simple operation and convenient installation. -Lightweight, portable, wireless design, it is more convenient for you to use this amplifier. -It can be connected to the data line, insert U disk, insert card, connect to and other forms of playback. -This wireless loudspeaker is suitable for lectures, tour guides, interviews, teaching and other activities. Package list: 1 x loud-speaker 1 x usb cable 1 x belt 1 x headset 1 x Audio cable