Specifications:- Overall Dimension(LxWxH): 3" x 2 15/16" x 2 3/8" (7.6 x 7.5 x 6 cm)- Slot Size(LxH): 2 9/16" x 11/16" (6.5 x 1.79 cm)- Inner Height: 7/8" (2.3 cm)- Battery Capacity: 75 mAh- Led Power: 0.1 W- Battery Life: 12 hrs, non-replaceable- Net Weight: 0.26 Lb (0.12 kg). Package Contents:- 1x Led Ring Box