ETvalley Wireless Mini Bluetooth Speaker with Hook, Suction Cup and Built-in Mic for Shower, Mountain and Cycling, Black Lasts up to 4.5 hours while playing Auto turn off 15 minutes later without using Stick it on wall, hang it on bicycle or bag with attached hook and suction cup Built-in mic allows you to pick up phone call in car, bathroom, at home or office. Waterproof and durable dustproof design ideal for shower and outdoor activities.