Product Specifications1.audio input jack:diameter of 3.5 MM - 4 section of input2.the speaker output power:4 ohms / 2 w3. FM transmission frequency:88.1 ~ 107.9 MHz4.built-in lithium battery capacity:300 MHA5.charging: DC5V 1 a6. support the biggest mobile phone size:10 cm wide7.working temperature - 10 to 60 degrees8. storage temperature from 20 to 70 degrees9. maximum size: 16 CM (L) * 5.6 CM (W) * 8 CM (H)10.Net Weight: 108 g11.This product standard audio line is compatible with the market，such as apple，samsung，HTC，Huawei and other most brand smartphones，but NOKIA series and so on a few mobile phones need additional configuration12.Size:16*5.6*8cmPackage inclued:1X audio cables1X car charger1X MICRO USB charging line1X Manual