Usongs Mini Small Keychain Flashlight 1 LED Torch Light Lamp Super Bright Bulb Key Chain Ring / Pocket Style / Water Resistance / Purple Shell Battery Type: Button Battery.Shell Color: Purple. Shell material: plastic Dimensions: 2.48" x 0.59" / 6.3 x 1.5 cm (L x Dia.) Weight: 23g / 0.81oz Note: DO NOT irradiate it to the eyes, especially for children, or else, it may be harmed the eyes