Our Wireless speaker adopts dual high-performance 3W drivers and passive delivers offer you an impressively crystal-clear sound quality and robust bass without any distortion. Fours modes for you to stream music: Wireless function, Aux-in, USB flash and TF card slot. Advanced Wireless technology connects stably from up to 33 feet away, and is compatible with all Wireless-enabled devices. Built-in Mic works well for answering phone calls. Handheld and compact size is suitable for outdoor activities, such as, trip, camping, hiking, etc.. *Crystal Clear Stereo Sound: Dual high-performance 3W drivers and passive delivers offer you an impressively crystal-clear sound quality and robust bass without any distortion. Now you can share music with your family members and friends even outside the house when having picnics or go hiking. *Unstoppable Music: Stable Wireless function allows you to stream your favorite music from your mobile devices to the unit wirelessly. Additional music streaming options include Aux input, USB flash and TF card. *Universal Compatibility and Clear Hands-free Calls: Advanced Wireless technology connects stably from up to 33 feet away, and is compatible with all Wireless-enabled devices. Built-in Mic works well for answering phone calls. *Irresistible Finish: Our wireless speaker with curved edges and sleek controls accentuate its unibody design. Choose from blue, red, orange, green or gray to perfectly complement your home and style. *Portable for Every Travel: The sturdy shell and palm-size design fits in your backpack easily, moreover, both sides of our iMounTEK Wireless speaker adopt hook loop design which let you easily hook it on your bag or any place you like. It is suitable for outdoor activities, such as, trip, camping, hiking, etc.. Warm Tips: 1. The product can ONLY be charged by 5V Adapter/USB Port. 2. This speaker cannot support waterproof. 3. Please read the User Manual to know about the function of buttons. 4. About The Volume Key: Long press the /- button to turn up/down the volume. Short press them for the next song / previous song. Brand: iMounTEK Product Type: Wireless Speaker Materials: ABS Plastic Wireless Version: V4.2 Music Streaming Options: Wireless /TF/U Disk/Aux-in Battery: Built-in 3.7V 800mAh Lithium Battery Charging Voltage: DC 5V / 500mAh-1000mAh Frequency Range: 87.5-108MHz Frequency of Amplification: 150 ~ 18000Hz ( - 3dB) Sensitivity: ≤1% SNR: ≥85dB Transmission Range: 10m/33ft Speaker: Double 4ohm/3W Speakers Unite (Diameter 45mm) Play Time: About 4 Hours Available Colors: Blue, Red, Orange, Green, Gray Main Item Size: 20.0 x 6.0 x 4.0cm/7.87 x 2.36 x 1.57inches Item Weight: 260g/0.58lbs Package Size: 21.5 x 7.0 x 4.5cm/8.46 x 2.75 x 1.77inches Package Weight: 300g/0.66lbs 1 x Wireless Speaker 1 x Charge Cable