Zoweetek Bluetooth Speaker with AUX Input for Echo Dot, Dual Drivers Stereo NFC Portable Wireless Speakers with Bass Dual 4 watts drivers provide sound louder than the normal 10 watts. Less than 1% harmonic distortion ensures clarity and fidelity of the sound. Two-channel stereo audio will make you feel like you're on the scene. The sound unit provides impressive bass. The low-frequency radiator enhances bass to enrich the sound. No noise, no delay and no distortion. Bluetooth connection distance can be up to 10M (33 ft). Supporting NFC, TF(Mirco SD) card and 3.5 mm AUX audio play. Compatible with Echo Dot, iPhone, Android Smart Phone, Notebook, Desktop Computer, Laptop, iPad, iPod and etc.. Small cuboid shape (5.71*1.78*2.17 inch) and light weight (11.4 ounces) make this speaker portable. IPX5 waterproof design resists gentle water spray & splash. Up and down silicone elastic pads reduce the audio loss and prevent the drop damage. Built in 1500mAh lithium-ion rechargeable battery. At least 12 hours of working time. You can use USB cable to charge this speaker. Built-in HD noise-reducing microphone supports clear hands-free calls. Carefully selecting 40mm strong magnetic NdFeB horn unit, compared with the same price hot-sale products, the sound has a broader shock. Adopting the bass passive diaphragm, the sound is more powerful and rich. Uses CSR Bluetooth chip to ensures lossless high fidelity audio transmission and further, faster, more stable reception of audio signals. Follow the principle of optimal circuit layout, makes people voices and instrument sound as close as possible to the original sound. Using intelligent bluetooth module, supports automatic bluetooth connection. Adopting radio frequency technology, connection distance up to 10 meters. Stable and no delay. When the device is dense and the bluetooth transmission becomes difficult, NFC function is faster and more stable for connection. Supports 3.5mm AUX standard audio cable input, plug and play. Supports TF (Micro SD) card playing.