+800MHz/900MHz(PLL)RF Technology
+Auto Tuning System on speaker
+Humanistic Operating Buttons
+Value added USB port accept direct MP3 music play
+Rubber cushion around speaker's body with 3'' full range speaker driver
+IPX-7 waterproof rating to protect against water immersion for 30 minutes at the depth of 1 meter
+3 underwater blinking blue LED mood lights
+Rechargeable Speaker(battery included)

Diameter of speaker:18cm
Modulation: FM,stereo
Carrier Frequency:800MHz/900MHz
Operation Voltage: Transmitter,6xAAAsize batteries(Excluded),or DC 12V adapter(included)
: Speaker,7xAA size batteries(Rechargeable,included)
Frequency Response: 20Hz-20KHz
Sound Power:over 110dB
Distortion: Less than 1%
S/N Ratio: Typical 60dB
Audio Power Output:8W RMS
Operating Distance: 800/900MHz,>60m
Operating Time:3.5 hours after fully charged