1、This is a voice amplifier, supports automatic search and playing. 2、This loudspeaker system is suitable for outdoor and other places. 3、Stylish, portable design. The sound is loud and clear. 4、Automatic search FM, whether indoors or outdoors, you can hear your favorite radio station at any time. 5、Support USB/secure digital memory card card playback. Plug and play, support MP3/WMA/WAV format. Features: This is a voice amplifier, supports automatic search and playing. This loudspeaker system is suitable for outdoor and other places. Stylish, portable design. The sound is loud and clear. Automatic search FM, whether indoors or outdoors, you can hear your favorite radio station at any time. Support USB/secure digital memory card card playback. Plug and play, support MP3/WMA/WAV format. Specification: Material: Plastic ABS Color: as picture shown Size: approx. 15x13x7cm/ 5.9x 5.1x 2.8inch (length*width*thickness) Frequency response range: 80hz-100k (Hz) Distortion rate: 5 (%) Output power: 68 (W) Type: wireless Rated voltage range of 3C: DC 36V and below Use distance: indoor more than 30 meters and outdoor up to 50 meters Charging voltage: DC 10V Use time: 8-10 hours Horn size: 5 inch full price Radio frequency: 90hz-18khz Battery capacity: 4800MA Charger plug: 2-pin US plug (100-240V, 50-60Hz) Remote control: button battery CR2025 (not included) Plug: US External power supply: DC 5V 500mA Charger voltage: 7.4V 3600MA Package List: 1 x Voice Amplifier 1 x AC Adapter/Charger (2 pin US plug, 100-240V, 50-60Hz) 1 x Data Line 1 x Microphone 1 x Remote Controller