What is the Bluetooth doing in a wireless microphone system? This is an invention that we created, adding the Bluetooth feature to this system has two main functionalities: 1. You can stream your music from your cellphone or any Bluetooth enabled device to the amplifier where you plug the system in, so you can sing a Karaoke from your device like iPad or Samsung Tab with back ground music. It is a perfect Karaoke machine. 2. If you do not use with Microphone, it is a Bluetooth Hot spot that you can connect any of your speaker system to this HS236 and make it a Bluetooth wireless speaker, just plug it on, it streams the music from your devices. The Hisonic HS236 Bluetooth VHF microphone system offers superior sound quality up to 100 feet in range and it offers the latest Bluetooth technology that allow you to stream music from your phone or Bluetooth capable devices. Additionally, the system offers 1 aux in, 1 aux out and RCA outputs that provides the highest signal quality to your mixer or amplifier. The HS236 microphones uses AA batteries to power, it offers between 5 to 9 hours of battery life per use.(It is recommended to use a high quality batteries). It comes with 2 handheld microphones that can be used together. It has echo and volume control on each microphone for your karaoke needs. This is a easy to setup, high quality microphone system for karaoke and speech. Finally it has a build in battery for the receiver that allows you to use the system everywhere up to 6 hours when fully charged. Package Included: 2 VHF Wireless Microphones 1 Receiver Connection Cables 4 x AA batteries.(For test use only, you need to buy high quality batteries to run a long time) Instruction Manual 1 Year Limited Warranty