Wireless Microphone Bluetooth Speaker is compatible with Android, IOS and other latest systems. With this speaker, you can instantly create own karaoke fun anytime and anywhere. Inbuilt 4.2V polymer lithium battery, we provide this speaker with a microphone of size 24.8x7x7cm (LxWxH). Offering resistance of 2 x 4Ω, our speaker is known for the frequency response of 30Hz to 20Hz ranges. Speaker is made up of good quality acrylonitrile butadiene styrene, aluminum and copper materials in gold color by incorporating hi-tech methods. In case of low voltage conditions, then this speaker shut down automatically. Whenever you connect this Wireless Microphone Bluetooth Speaker with standard USB/adaptor cable to charge it, a red light will blow up.