Allé Designs | Our customers at libraries, offices, and courtrooms have specifically requested quiet clocks. Our NEW smooth-sweep silent molded case battery clocks are battery-operated and are completely quiet. A battery-operated clock typically requires a new battery every year. The Battery Booster Pack “boosts” the battery life to five plus years and batteries are included. Our clock features ablack impact-resistant molded plastic case with built-in hanger, shatter-resistant polycarbonate crystal, black numerals and minute markers on a non-yellowing white dial, and stylish hour and minute hands are aluminum with a black finish and a red sweep hand. All our clocks are made in the USA and on our GSA Contract.