Bluetooth Speakers, ZENBRE Z3 10W Portable Speakers with 20h Playtime,Computer Speaker with Dual-Driver Enhanced Bass Resonator (Silver) Vigorous Deep Sound Quality Double 5W Bluetooth Speakers and Enhanced BASS Resonator, combined with more than 90db SNR, delivers a qualified listening experience even CROSS A WALL! UP to 20h PlaytimeBuilt-in 2600mAh Rechargeable Lithium Battery for up to 20 hours playtime. Built-in microphone for Hands-Free speaker phone calling.(70% volume is up to 20h playtime,the Max volume is up to 12h!) Bluetooth 4.1, Smart ConnectionEquipped with advanced Bluetooth 4.1 tech, make the connection fast. Universal compatibility, enable the speaker easily connect to Echo Dot, Computer, Laptop, Tablets, Laptop, Blackberry, Nexus and other devices. Multiple FeaturesSensitive touch button easy to control. Support Micro USB Charging, and MORE available Mode option, a TF Card allow you enjoy music by Micro SD card; Along with FM radio (87.5 - 108 MHz), make option more than music. Classic Design, Piano painting standardThe elegant Portable Wireless Speakers design, in classic simplicity, which fit to home fantastically, plus the compact and sleek high-quality ABS cover reflex some shine in bright environment.