MIFA F4 Ultra-Light Wireless Bluetooth Speaker Grey,with Mic,Micro SD,Hook,and Aluminum Alloy Housing Shock Resistance, 3W,4 Hours Playtime 1,Bluetooth speaker LIGHTNESS High quality aluminum alloy housing, durable and abrasion resistance, Rechargeable li-on battery ,4 hours playtime,103g only on the weight.Support IOS system ringtone playing,others are defaut tone,high effect Li-ion batterysupport USB charging 2,Perfect building,Operate by one hand Rounded edges design, soft arc, anodic oxidation technology on the surface, durable and abrasion resistance.wireless connection with any compatible stereo Bluetooth device.Enjoy the wireless music just by searching and connecting with Mifa_F4 3,WIRELESS-EASY TO USE Fast wireless connection with any Bluetooth device such as mobile phone, notebook, iPhone or iPad. Playing games, listening to music with wireless connection.Easy connection. 4,Slim and Tiny Portable, Good sound With wireless Bluetooth technology, support handsfree function Support MP3WMAWAV audio format files Support micro SD card & voice prompt,Automatically power off when there is no operation in 10 minutes in SD card mode, except for bluetooth mode 5,Aluminium alloy casing ,light and portable to carry,shock resistance,With Bluetooth technology , paired with Iphone, Samsung and other smartphones and music players