ITEM NAME:White Bluetooth Bass Speaker Portable Outdoor Sport Loudspeaker Wireless Mi S5F1 White Bluetooth Bass Speaker Portable Outdoor Sport Loudspeaker Wireless Mi S5F1 Impressive & Loud Sound: Designed with Class-G double charge pump audio power amplifier and DSP 3D chip; 3W driver delivers loud, clear, high-def stereo sound and enhanced bass. Dust-proof &shockproof: ABS+PC housing ,ensures shock-proof. Long Battery Life: Built-in 400 mAh rechargeable Lithium Polymer battery allows for up to 4 hours of playtime at 75% volume; recharge in just 3 hours with the included premium Micro-USB cable. Ultra Portable: Mini-sized for take-anywhere convenience; fits easily into any pocket or handbag; offers a detachable alloy metal loop hook for outdoor adventures like camping, hiking or biking. Bluetooth 4.0 Technology: Easy to pair with iPhone, iPad, laptop and any other Bluetooth-enabled device; instantly reconnects to the last-used device automatically from up to 33 feet away. Working voltage: 5V Speaker power: 3W Working hours: 3H (medium volume) Impedance: 4 ohm Frequency range: 130Hz-20kHz Distortion: less than or equal to 0.5% Signal to noise ratio: greater than or equal to 80dB Bluetooth connection distance: less than or equal to 10 meters Input sensitivity: 500mV Input mode: Bluetooth Play time: Normal, normal volume playback up to 4 hours; Colour: White Material: ABS+PC Size: 63*45*73mm Package Contents: 1 * P17 Bluetooth Speaker 1 * USB charging cable 1 * instruction manual