Features:Enjoy gorgeously rich sound， made possible by leading audio technology: perfect clear highs， dynamic mid-range， thumping bass; passive Noise reduction isolates sound for an ideal listening experience3 in 1 Audio input: Support Bluetooth， TF card， AUX inputBuild-in Voice prompts and Microphone for hands-free speaker phone calling Easy to pair - No code/pin needed.Up to 8 hours of music from Li-Ion Rechargeable Battery 2500mAhCompatible with Bluetooth devices， including Bluetooth enabled TVs and tablets， iPhone， iPod， iPad， Samsung Galaxy s6 Edge Note /3/4/5， Nexus， Android， HTC， LG， Nokia， Motorola， Windows Phone and moreSpecificationsAudio Input: Bluetooth， TF Card， AUXSpeaker Diameter: 40mm， Dual SpeakerPower Output: 4.5W x 2Operating Voltage: 3.7VSNR: ��80dBADistorion: <1%Frequency Rsponse: 100Hz-18KHzBuilt-in Microphone and Voice promptsBATTERY & POWERbattery: 2500mAhMusic Playing Time: 4 to 8 hoursCharging Time: 1.5 to 2 hoursBluetooth Transmission Distance: 10M(33 feet)What's In The Box:1 x Ottertooth Bluetooth Speaker1 x User Manul1 x USB Charging Cable1 x AUX 3.5mm Audio Cable