a small power plant very well finished with 4 small blue LED lights (4 = 100% 3 = 75% 2 = 50% 1 = 25%) robust and lasts a long time by connected the I have a Boombox after 3 days still stand 50% power available more than I have me in erhoft other pantograph the values differently I audfallen have currently only the Logitech Boombox to run daily at the 5-8 hours and as genant top still 50% power in reserve it is also included lots of accessories and a power adapter to charge the battery pack's see maybe comes still a second part The delivery went well and Ruckzuck Packed with lots of accessories Thanks I am very satisfied I hope could help Schüss