Logitech UE BLAST Speaker General Features: Color: Graphite Bluetooth wireless technology 802.11b/g/n Wireless 360° sound Can pair up to eight (8) BLAST devices Stream music up to 330 feet away Speakerphone function for hands-free phone calls Amazon Alexa enabled Waterproof and virtually indestructible IP67 rated Ultimate Ears Blast & Megablast app support (iOS & Android) Rock while you dock! access any of Alexa’s skills, listen to music all while charging your BLAST LEDs: Power indicator Bluetooth pairing indicator Ports: Micro USB Power Adapter Specifications: Input: 100-240V 50/60 Hz 0.3A Output: 5.1V 2.0A Unit Dimensions: 7.4 x 2.67-inches (Height x Diameter)