DBEST London PS4003 Duo Rechargeable Mini-Speaker Set Engineered for exceptional clarity of sound Two powerful built-in amplifiers for a surprisingly loud volume 360 degree stereo system High-capacity Lithium polymer batteries for up to 48 hours continuous playback Sleek, ultra-portable design with magnetic joining bases Compatible with phone, laptop, iPod/iPad and all audio equipment featuring a 3.5mm jack Compatible with all standard USB chargers (PC, car, wall) Includes deluxe travel pouch