Karaoke microphone Wireless Device interface: Bluetooth 2400 MHz Gold, White Power source: Battery Lithium Polymer (LiPo) 2000 mAh Cables included: Audio (3.5mm), USB Features:- 2-in-1 Karaoke microphone with two built-in 3W speakers- Music streaming via Bluetooth V4.1 or AUXIN (mobile phone, tablets, PC, etc.)- Compatible with various singing & Karaoke APPs- Equalizer function (treble, bass & echo adjustment)- Music & microphone volume adjustment- Built-in rechargeable 2000mAh battery for portable use- Easy to use & very stylish design The ideal fun: singing with family or friends, for ceremonies & Karaoke partiesTechnical specifications:- Bluetooth V4.1, A2DP profil, ~8m transmitting distance- Output: 2x 3W stereo speakers, impedance 3, SNR 80dB- Frequency range speaker 100Hz~10KHz- Maximum sound pressure level: >115dB, 1kHz, THD