Bullet Points:1High-Quality Material: Identification Marker Light is made of high-quality silicone and gel with good sealing (water resistance) and flexibility. This product can operate well in an environment of -20C to 50C.2Always Bright: The identification signal light has two operation modes, which are always on and flashing. The built-in CR2030 button battery can work for about 100 hours.3Excellent Performance: Our Identification Marker Light has excellent performance, which enables high brightness, low light decay, stable performance, low heat, and low power consumption.4Easy to Use: The signal light can be hung on a backpack, attached to helmets, attached to a bike seat, or hung around the neck, convenient for you to use.5Widely Used: This signal light has a wide range of applications and is a must-have for your outdoor activities such as cycling, hiking, hunting, diving, etc.Description:Identification Marker Light is made of high-quality silicone and gel with good sealing (water resistance) and flexibility. This product can operate well in an environment of -20C to 50C.Specification:Material: Silicone, ResinSize: 11*2.6CM/4.33*1.02inApplicable: Camping, Hiking, Mountain Climbing, Cycling, etc.Lighting mode: always on, flashingBattery model: CR2032Battery life: up to 100 hoursWaterproof grade: IP67Packing List:1*safety flash, 1*CR2032 battery (built-in)