Specifications Power Output (Peak) : Class 2 / 4dbm Receiving Sensitivity : -91db, @0.4%BER Operating Range Upto : 10m Charging Standard : DC 5V, 500mA Charging Time : 1.5-2 hours Music Playback time : 5-7 Hours at 70% volume Operating Frequency : 2.400 GHz - 2more...