SL-10 is a high-quality outdoor BT speaker, with cylinder-shaped appearance and powerful sound. It supports FM radio, TF card, U dirve and 3.5mm AUX IN music play; with microphone, you can enjoy hands-free calls.Features:High Quality Crystal Clear Sound:Deep bass 10 watt HD loud speaker with 2.5" premium driver provide you with crystal clear sound and strong bass without distortion even at highest volume.Advanced BT Technology:Adopts advanced BT 4.2 technology, range more than 10m, you can easily connect with almost all BT-enabled devices.TF Card & AUX & USB Drive Music Play:Via the TF card slot, 3.5mm audio port and USB port, you can connect the devices without BT function.Built-in Microphone & FM Radio:Built-in microphone lets you enjoy hands-free calls; built-in FM Radio, perfect for travel and hiking, superlight and easy to fit in your backpack, baggage.Portable Design & Large Capacity Battery:With a adjustable webbing strap, easy to carry outdoor. High capacity rechargeable 1200 mAh lithium battery supplies up to 4 hours of playtime at 2/3 volume on a full charge.Specifications:Model Number: SL-10BT Version: 4.2Working Distance: up to 10mFrequency Response Range: 200Hz-20KHzSpeaker Sensitivity: 78dBSpeaker Unit: 2.5"Speaker Power: 4ohm, 10WSignal-to-Noise Ratio: ≥80dbDistortion: ≤0.1%Battery: Built-in 1200mAh 3.7V 18650 rechargeable lithium-ion batteryPlayback time: about 3-4 hours (in medium volume)Charging time: about 2.5-3.5 hoursCharging Voltage: 5V/ 1AColor: BlackItem Size: Approx. 22.2 * 11 * 9.5cm / 6.88 * 2.95 * 0.82inItem Weight: Approx. 552g / 19.46ozPackage Size: Approx. 23.5 * 11.9 * 10cm / 6.88 * 2.95 * 0.82inPackage Weight: Approx. 665g / 23.45ozPackage List:1 * Speaker1 * Micro USB Charging Cable1 * 3.5mm Audio Cable1 * Webbing Strap1 * User Manual (English & Chinese)