Stylish new appearance Bluetooth V2.1 JL scheme Super Bass and Support Handsfree Support TF card , USB, LINE IN, FM radio function Input 5V, Output : 3.7V / 1200mA Speaker : 3W × 2, speaker power : 10W Frosted matte surface appearance , high-grade metal speaker mesh , Bottom with silicone pad , convenient fixed in the smooth surface Feature: Ultra compact design, super bass. Bluetooth, FM radio, TF card, USB, AUX in, Headphone jack. 2.4G bluetooth wireless connection play system. Dual large 50mm speakers with vibrating membrane. Built in 1200mAh battery. Built in microphone for hands-free call. Simple instructions to pair S311 with your phone: Be sure the bluetooth speaker is on; Turn on the bluetooth function of mobile phone and search for S311; Pair it and "Pair successfully" will be announced. Brand SOMHO SKU SO640EL1LLHWSNAFAMZ-167975 Model S311