Easy to Read - Large black bold numbers against white face background creates easy viewing.Sturdy plastic frame with spherical convex glass lens keeps dust away from dial. High Quality Wall Clock - The newest black wall clock frame environmental engineering plastic, non-toxic and safer; metal pointer is used and copper sleeve is added for reinforcement, which is more closely combined with the movement. SILENT MOVEMENT - Quiet sweep and precise quartz movements to guarantee accurate time, ensure a good sleeping and working environment. Battery Operated and Easy to Install - Powered by one AA battery (not included),We do not recommend the use of high duty batteries. Back slot design offers easy installation , just put a small nail through the plastic hook and it securely hangs on your wall within a few seconds. (The package contain 1 hook) FULL-SATISTACTION GUARANTEE! If you are unhappy with this clock for any reason, contact us within 3months for a full refund or replacement. There's also a 365 day quality guarantee against defective parts.