Plug and Play: The mini portable speaker no need to download any driver and wait a long, just only plug it into your device directly and turn on the power, then you will enjoy loud voice immediately, very simple and convenient to use. High Sound Quality: This mobile phone speaker with a 3w speaker in 4ohm and SNR>90db to keep the high sound quality with clear bass, can amplify your device volume up to 4 times and lets you enjoy the lossless loud voice. Portable Design: The mini wireless speaker size just 46*46*33mm, compact and lightweight design, easy to pack in your pocket, briefcase, and handbag and carry to anywhere for using it anytime. Power Saving and Durable: Built-in 350mAh lithium battery, does not consume mobile phone power when playing, and lasts for long time. Once battery drained out, only 45 mins needed to get a full charge through the micro USB port. Perfect Compatibility: It works with any media device with a 3.5mm jack such as mobile phone, tablet, MP3, CD player, laptop, just turn power on and plug it directly to play music or video audio. Specification: S/N: >80dB Net Weight: 44g Output Power: 3W Plug specifications: 3.5mm Speaker power 3.7V 350mAh Charging voltage: DC5V 500 mA Material: Plastic/Silicone Frequency Range: 50Hz-18000Hz Product Size: 443.5cm Li-ion Battery Capacity: 3.7V, 350mAh Charging Indicator: Red for charging, off for fully charging.vPackage includes: 1 x Wireless Mobile Phone Speaker 1 x Charging Cable