The ECOXGEAR EcoBoulder+ Bluetooth Party Speaker is waterproof, submersible, and even floats. Let it sit outside in the rain or snow or drop it in a river, it keeps on playing. The EcoBoulder+ wirelessly connects via Bluetooth to your smartphone, tablet, or laptop with up to 100-feet of range. A simple touch of the EcoTalk button activates the built-in microphone connecting you with your Siri or OK Google voice assistant. It provides 100-watts of peak output power, containing an 8-inch main driver, 3-inch tweeter, plus an 8-inch subwoofer for balanced, full sound with crisp highs, clear vocals, warm midrange, and deep bass. It includes an AUX-IN, USB charge port, and AM/FM radio with 5 presets. You can use standard AC wall power for continuous play. The EcoBoulder+ can be played while the battery charges. When using the integrated rechargeable battery, you can enjoy up to 50-hours of playtime at typical listening levels, or 10-hours at max volume, or up to 100-hours on standby or very low volume levels. With EcoConnect, you can pair two EcoBoulder+ Party Speakers together at a distance up to 30-feet between the two speakers, and be completely immersed in sound. You could also pair one EcoBoulder+ to any other ECOXGEAR speaker that supports the EcoConnect feature, including the original EcoBoulder (Note: EcoConnect only supports Bluetooth Audio. You cannot stream AM/FM or AUX-IN audio between the two speakers). The two cup holders are large enough to hold insulated mugs. The extra-long, telescoping handle and oversized, rugged wheels allow for easy transport.