Description This is a wireless speaker. High capacity rechargeable 1800mAh Li-ion battery for up to 8 hours of playtime based on music volume. High definition sound makes you enjoy an impressively crystal clear sound quality and robust bass realized through dual high-performance drivers and passive subwoofer. Super lightweight, great portability, music on the go. Waterproof, dustproof, drop resistance, this speaker is perfect for outdoor activities. Stylish and exquisite appearance, which is convenient to carry,With it you can enjoy music anytime and anywhere. NFC technology for easy and instant pairing. Built in microphone allows you to answer calls while listening to music. Feature - Color: Green. - Material: Silica gel + ABS. - Size: 17 x 6.6 x 6.6cm. - Interface Type: USB. - Battery capacity: 1800 mAh. - Frequency response range: 40Hz-20KHz. - Output power: 6W. - Signal to noise ratio: ge;75dB. - Power supply: Built-in lithium battery. - Battery capacity: 1800mAh. - version: JL-4.0 distance 10 meters . - NFC Technology (Near Field Communication,Only for Android) for easy and instant pairing. - 1800mAh power bank can charge your phone or other device in emergency. - speaker 4.0 connects faster, more stable, compatible with all your -equipped devices. - Outstanding connection range of up to 10 meters.