EWA A104 Bluetooth Speaker MP3 Player Portable Speaker Metallic USB Input MP3 Player Stereo Multimedia Speaker(Grey) Feature: 1.focusprofessional Be careful about every detail on the space, ability is in so cabinet size, achieve the optimal balance of sound quality and sound cavity, bring purer, full, hongliang timbre. 2.Delicate, more than one side Stainless steel materials with etching process, the difficulty and cost is higher than several letter, only for the delicate side. 3.Featured super bass give you high fidelity music enjoyment 4.Big power with small volume,redefine the super bass concept. 5.Dual-frequency deconding,support TF card,plug-and-play Specifications: Battery500MA RMS3W Frequency100-18KHZ SNRSN85DB Playing time4 Hours Charge Time2 Hours Bluetooth Frequency2.4GHZ-2.48GHZ Bluetooth ProtocolsHSHF,A2DP,AVRCP,OPP Size48*H38.5mm Gross weight: 160G Outer box size: 40*32*17.5cm Packing quantity: 40PCS Packing weight: 9.1kg packing list: 1 * speaker 1 * USB charge cable 1 * user manual