Expower(R) Wireless Bluetooth Speaker Waterproof Shockproof Wireless bluetooth Speaker last 12 Hours Playback Waterproof,Shockproof,Dustproof Rated IPX4 for 100% protection against Water and Dust. Rubberized rugged exterior for ultimate impact resistance. Compatible with most Bluetooth-enabled devices: Including Apple, iPhone, and iPod, most Android devices and other smart devices for simple wireless audio streaming Jaw-dropping Sound Quality and Volume - Equipped with super bass diaphragm,it will deliver the rich bass and sound quality that you crave,Near-field communication technology: Allows simple, one-touch pairing Lithium ion rechargeable battery,Built-in rechargeable 3.7V, 3600 mAh lithium-ion polymer battery: Provides extended playback, enables you to stream music for up to 12 hours on a full charge Advanced Bluetooth 4.0 Technology- Ultra-optimized version of Bluetooth that consumes less energy and delivers crystal clear sound