Zerone Portable Mini Speaker, 240H Standby 3.5mm Audio Jack&Micro USB Charging Mobile Phone Speaker for iPod/iPad/Tablet/Laptop New but opened/slight scruffy packaging Color transparent + black Frequency 80Hz - 20kHz Signal to noise ratio 80 dB Battery Li-ion 3.7V 250mAh Working hours 4H Battery recharge time about 45 minutes Charging port micro USB
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