Portable Mini Wireless Stereo Bluetooth Speaker For iPhone Tablet PC FM Feature: Quantity: 1 100% Brand new and high quality. Hand-free for phone callings and music player Multi-function, Volume Control, Bluetooth Speaker, Hands-free, FM Radio, TF Card Bluetooth Effective distance :30m Support phone answer and hang up FM: 87MHZ-108MHZ Automatic Save Antenna: connect USB or Earphone Power Memory : Support the volume songs memory Audio format :MP3 TF Card: 8G (Not include in the package) Audio input: Support Mini USB Voltage: 3.7V-4.2V Frequency: 20Hz-20KHz Power: 4Ω3W Play time: 50 minuets Charge time: 180 minuets Electric current: DC 500MA Package Content: 1X Speaker( with retail package.) 1x USB Cable