Miniature brown donut-shaped security alarm. Normally, the switch is turned on, and in an emergency, it is activated by pulling. As shown in the third photo, the part near the little finger extends and a loud sound is emitted. It uses three LR44 button batteries. New batteries have been purchased and installed, and operation has been confirmed. The surface has a few scratches when held up to the light, but they are hardly noticeable. - Model Name: Mini Donut - Switch: ON/OFF - Size: Mini - Color: Brown - Clip: Metal clip Thank you for viewing.