Bluetooth karaoke microphone CHOIR: with Bluetooth version 3.0, colour-changing LED light, music output: 3 Watt, slot for microSD card, frequency range: 20 Hz - 20 KHz, rechargeable battery, capacity: 2200 mAh, USB charging cable (length: approx. 31 cm), charging time: approx. 4 h, incl. switchable echo effect, suitable for many current karaoke apps. Bluetooth karaoke microphone CHOIR: with Bluetooth version 3.0, colour-changing LED light, music output: 3 Watt, slot for microSD card, frequency range: 20 Hz - 20 KHz, rechargeable battery, capacity: 2200 mAh, USB charging cable (length: approx. 31 cm), charging time: approx. 4 h, incl. switchable echo effect, suitable for many current karaoke apps.