Loudspeaker for mobile, with base plate

Sound source for experiments on acoustics;
Compact loudspeaker for a mobile phone, tablet, or PC/notebook (also iPhone, iPad, iPod) as well as for MP3
Control buttons for play/pause, volume, track forward/backward
On/off switch
Robust grille protection for the speaker membrane
Aluminium housing, metallic colour
Cable for connection to a mobile device and for charging the battery
Device-shaped plastic base plate 120x90x25 mm

Technical data:
Memory: MicroSD card and USB stick (up to 32 GB).
Connections: USB and 3.5 mm jack socket
Power supply: Lithium-ion battery, 3.7V/600 mAh
Playback time: approx. 8 - 9 h
Battery charging time: approx. 3 - 4 h
Power supply: 5V DC (included in delivery)
Loudspeaker: Da=45 mm, 4 Ohm, 3 Watt
Dimensions: 50x50x50 mm
Weight: 107 g (loudspeaker)
159 g (complete set)