Color: 【Yellow】 Description: LED Armband Running, jogging, walking, cycling, camping, outdoor sports, walking, LED slap bracelet, adjustable strap, safety light, school bag, cycling, mountain climbing, cram school, lessons, pet walking Can be used in various situations. 【Specifications】 Product Name: Luminous Armband, Silicone Armband Specifications Size: Main body 18.5 * 3.5 * 1 cm, Elastic band 12-17 cm, Width 2 cm Material: PVC silicone Weight: 65 grams Battery: CR2032 button battery (test battery included) Light Modes: Long on / Flashing / Off Note: Due to differences between monitors, the actual color of the item may vary. Please compare the detailed size with your keychains, etc. There may be an error of 1-3cm in the measured size. Please understand. Due to being an imported product, there may be small scratches or scuffs. Please understand. Thank you for your understanding.