Compatible with: Laptops， MP3/MP4 devices， TF/USB Flash Drive， any Bluetooth-supported audio devices. Specification: �~ Material: ABS plastic �~ Bluetooth version: V3.0 +EDR �~ Transmission distance: approx.10 m �~ Frequency range: 100Hz -20 KHz �~ Sensitivity(TYP): 80db��2 �~ Rated power:3w �~ Input power supply: DC5V 500mAh �~ Working voltage: 3.0V-5.5V Package includes: 1 x Rugby shape portable bluetooth speaker 1 x USB cable Cautions: �~ In case damage to the product， please use only the provided cable or correct cable to charge the product �~ Before charging other device，make sure input voltage of the device matches output voltage of the product �~ Please prevent dropping，knocking，disassembling or dispose to strong sunlight/ water/fire/temperature above 60 C (140 F) conditions �~ Please do not leave the product in car，as hign temperature in car may damage the product �~ It is normal that the product may be slightly warm during charging.