Size: 12x20x12 cm 4 in 1 Karaoke Microphone Portable hand-held wireless microphones can be used as microphone, speaker, loudspeaker, recorder. Mini home KTV for music playing and singing at any time. Quality Audio Sound and High compatibility Professional audio processor and tuning system, three layers high destiny noise reduction, creating a stunning KTV live-sound environment and wonderful echo reverberation. Two Way Connection 3.5mm audio jack and connection, the wireless karaoke microphones can connect with all devices including Android iOS smart-phones, PC, laptops and APP such as YOUTUBE etc. connection has a great distance of 10m without obstacle. Long Palying Time Built-in 2400mA rechargeable battery, this Wireless Karaoke Microphone can last more than 5-6 hours after a fully charge.