My Best "Little" so far

JBL Micro Ultra Portable Rechargeable Portable Wireless Bluetooth Speaker with 3.5mm jack Compatible with smartphones, tablets and MP3 devices, including iPhone 4 / 4S / 5 / 5S / 5C / 6/6 Plus, iPad 2/3/4 / Air / mini, iPod Nano 7th Generation, iPod Touch 5th Generation, Samsung Galaxy S2 / S3 / S4 / S5, 2/3 Galaxy Note, Galaxy Tab 2/3/4, Xperia Z1 / Z2, HTC One / One M8 and Google Nexus 5 / 7/10 - Blue (Electronics)

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JBL Micro Ultra Portable Rechargeable Portable Wireless Bluetooth Speaker with 3.5mm jack Compatible with smartphones, tablets and MP3 devices, including iPhone 4 / 4S / 5 / 5S / 5C / 6/6 Plus, iPad 2/3/4 / Air / mini, iPod Nano 7th Generation, iPod Touch 5th Generation, Samsung Galaxy S2 / S3 / S4 / S5, 2/3 Galaxy Note, Galaxy Tab 2/3/4, Xperia Z1 / Z2, HTC One / One M8 and Google Nexus 5 / 7/10 - Blue (Electronics)

Buy at Amazon.com

Customer Review

I've already tried x small speakers. The "JBL Micro Wireless" is the first and so far only one who fits.
+ Easy Bluetooth connection (to myself iPhone)
+ Volume control on the speaker is possible (though quite smooth running wheel)
+ For the size super sound and super bass (as I said ... "for size"!)
+ Compact yet stable and not so delicate (kaputtbar) as compared products

PHILIPS SBT30 / 00 ordered Hab parallel, which goes back again directly.
Although not entirely bad, but no comparison!

For noise that some describe here ...
Yes, it is audible. ... When I hold the ear in pauses between the songs, so in silence, directly on the speaker.
During operation, when music is playing, it is not audible (for me). So no deduction. Do not cares.