Karaoke mike with wireless Bluetooth speakers. Can be used as a speaker, player, radio & recorder. This mike is compatible with various singing applications as well. - Bluetooth, AUX (3.5mm jack), SD card, USB & radio mode can be used to play music. - mike has an echo effect option - high-quality, noise reduction speakers.Stunning ktv live-sound, and clear music rhythm with echo reverberation. - 4 Voice changing options available - suitable for picnic trips, party, family entertainment, singing. Compatible with most mobile phones and tablets - Bluetooth wireless design for connecting to any Bluetooth enabled smart devices. Distortion is less than 0.5 % Output Power: 5W max sound pressure level: &get; 115dB 1Khz tdh<1% reverberation mode: sound effect reverberation power supply: built-in 18650 li-battery battery capacity: 1800 mAh.