i-Sing Ultra Portable Wireless Bluetooth Speaker,Build in Microphone for Handfree Phone Call, With Car Windshield Suction Cup Mount- Black Professional speaker! 50mm powerful speaker with total 6w offer a strong sound. ideal for watching movies, listening to music and playing games. Wireless connection to bluetooth and NFC, or by aux cable 3.5 mm jack. Playback duration of 5-8 hours after fully charged, due to the built-in 500mah Li-ion battery. Built-in microphone for wireless calls. the wireless microphone can be wireless phone, you can't miss important call. Easy to use without any button, just controls by rotating the body of the speaker worked well to adjust the volume/ pause the music/ advance/go back/ answer. package include car stand holder can use the Bluetooth Speaker for fixed on the window of your car (like in work trucks and vans) and enjoy seamlessly music on-the-go.