Ubetter Portable Wireless Bluetooth Speaker, Powerful Sound with Enhanced Bass, Surround Speakers with FM Radio, for All Bluetooth Devices (Black) Full and High-Def Sound Quality: Hi-Fi comparable speaker engineered with 3D dynamic sound technology, hundred times of tests to find suitable material for cone diaphragm. Conex for damper, standard woofer structure with 2 passive radiators in uni-body structure, which is finely crafted from premium materials. Long Playtime, Fast Recharge: With (2 x 5W) Built-in Large-capacity Li-Ion Rechargeable Battery for up to 10 hours of non-stop music at 80% volume, three times longer than similar-sized portable speakers. Recharge in just 3 hours using the original Micro USB cable. Wireless Function: Wireless and compact, so you can take your music with you anywhere and anytime. Broad Compatibility: Quick pairing through Bluetooth with iPhone, iPad Mini, iPad 4/3/2, iPod, Blackberry, Nexus, Samsung and other popular smartphones. Alarm Clock and LCD Time Display:Standard Alarm song is bird singing. It supports to other songs from external U-disk or TF card.The alarm song will last 30 seconds every time and it will ring every 5 minutes if you do not turn off it.