This wireless microphone integrates wireless speaker to let you to sing, practice, record and even listen to songs at home whether being alone or having fun with a bunch of friends with echo reverberation for Karaoke effect. Simply pair the microphone with your wireless-enabled devices to record and share with friends on app or merely listen to your favorite songs. It also plays songs stored in micro SD card, USB driver and other 3.5mm audio devices. Produces clear sound with echo reverberation Ideal for all vocal applications (singing or talking) Plays music from universal wireless-enabled devices, micro SD card, USB driver or via auxiliary connection Works with different applications for sound recording Allows for taking calls hands-free and redialing the last number dialed Simple buttons for controlling volume, playback, call, on/off and echo effect One device can pair with two karaoke microphones simultaneously for singing and recording together Comfortably fits in one hand Charges conveniently via the included USB charging cable Wireless Version: 4.2 Input: DC 5V/1A Driver: 2 x 52mm, 4O Output Power: 5W x 2 Reverberation Mode: echo effect Frequency: 180Hz-20KHz S/N: =80dB SPL: >115dB 1KHz THD<1% Transmission Distance: 32ft Runtime: 5 hours (sing), 3 hours (play) Charging Time: about 6 hours Battery: built-in 3.7V 1400mAh rechargeable li-ion battery Carrying case size: 29 x 12 x 8cm/11.4” x 4.7” x 3.1” (L×W×H)) Carrying case weight: 136g/4.8oz Size: 26 x 7.3 x 7.3cm/10.2” x 2.9” x 2.9” (L×W×H)) Weight: 385g/0.85lbs Package Size: 29 x 12 x 8cm/11.4” x 4.7” x 3.1” (L×W×H)) Package Weight: 514g/1.13lbs 1 × Wireless Karaoke Microphone with Built-in Speaker 1 × USB Charging Cable 1 × Carrying Case 1 × User Manual