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/back, on/off switch, robust grille protection for the speaker membrane, aluminium housing, metallic colour
Cable for connecting to a mobile device and for charging the battery
Moulded plastic base plate

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 scope of delivery)
Loudspeaker: Da=45 mm, 4 Ohm, 3 Watt
Dimensions of the loudspeaker: 50 x 50 x 50 mm
Dimensions of the base plate: 120 x 90 x 25 mm
Weight of the speaker: 107 g
Mass of the complete set: 159 g