Product feature:1. Bluetooth speaker card stylish appearance、 not only high-grade and durable.2. Bluetooth wireless transmission、 support for hands-free calls.3. Support TF card autoplay.4. Support audio output can be connected to computers、 mobile phones、 MP3 and other audio interfaces.5. Sought after by overseas customers.Parameter:Bluetooth Version: Bluetooth2.1Effective power: 3WStandby Time: 1 hoursSNR:> 80DBDistortion: <0.5% Frequency: 90Hz-20KHzAudio Interface: 3.5MMImpedance: 4ΩBattery: Built-in 500MAH Li-ion polymer rechargeable battery.Speaker driver: 45mm 4Ω 3WFreq: 90Hz-20 KHzTransmission Distance: 10mColor: Blue、Pink、White、greenSpeaker size(cm): 6*6*6.5Package List:1* mini speaker1* USB charging Cable1* retail box