Now that it is possible to carry your own music wherever you go, outdoor camps and trips, just take along a backpack with speakers to be able to enjoy your music at any time. The experience can be fun when you are outdoors at a location with your favorite music playing in the background. The Doppler audio pack 6000 mAh is one such wonderful kit that you can use and gift to anybody who likes to carry music. The 6000 mAh power bank is more than sufficient to ensure continuous music playback. Just connect the device to the speakers using Bluetooth to get close to 10- 12 hours of music.