【 PARTICULAR DESIGN】 - The excellent design of our karaoke wireless microphone is very suitable for your hand, which can make you feel more comfortable. And the built-in high-quality Bluetooth module can be used as speaker, player and Recorder, compatible with various singing applications 【TWO WAYS CONNECTION】— Bluetooth Connection & Cable Connection. You just need to connect your phone with cable or Bluetooth, and then open the singing APP on your phone. The built-in clearly audio and vividly sound effect can make you listening and singing anytime and anyw. 【HIGH COMPATIBILITY】— Supporting micro SD card max 32GB(NOT INCLUDED) and song switch. The Bluetooth has a great distance of connection(10m) 【EASY TO USE】— Multi-function buttons, easy to switch to different model, adjust volume, sing and play music. With echo model,our karaoke wireless microphone can bring a surrounding immersion. And the USB port allows you to plug USB, turn this magic piece to MP3, and play it directly 【 Rechargeable Battery】— 2600mAh rechargeable multi-protect lithium battery(18650) ensures a longer sing time. Quicker charging, long-time lasting.