Alpine AD-SPK1 Waterproof Bluetooth Speaker The Alpine AD-SPK1 Waterproof Bluetooth Speaker is tuned for adventure. With two midrange speakers, two tweeters, and two external passive radiators, the Turn1™ provides a stereo sound performance that can produce up to 40-watts of powerful sound. The speaker is waterproof (IPX67) and tuned to be played outside, so even in open-air with wind or other noise, music still comes through clear. General Features: Bluetooth Wireless Audio Streaming: Stream your favorite music wirelessly. 12+ Hours Playtime: Enjoy extended playtime that varies by volume level and audio content. Waterproof: IPX67 rated, perfect for outdoor use. True Wireless Stereo (TWS): Pair up to two speakers for a true stereo experience. Built-in Mic: Hands-free calling capability. Auto Power Off: Conserves battery life when not in use. Dual External Passive Radiators: Enhance open-air bass extension. What's in the box: Alpine AD-SPK1 Waterproof Bluetooth Speaker Micro-USB to USB Charge Cable 3 ft Carry Strap Warning:This product can expose you to chemicals known to the State of California to cause cancer. For more information, go to P65Warnings.ca.