Talking Alarm Clock (630-0901) Specifications Faxback Doc. # 17169 Power Requirements:.......................................Two AAA Batteries Accuracy:....................................................+-0.67 Sec/Day Dimensions:..................................3 7/16 x 3 1/16 x 1 7/8 Inches (87 x 77 x 47 mm) (HWD) Weight:......................................................4.8 Oz (136 g)