Features1 MATERIALS: 4 in 1 bike lights does not hurt the phone and preserve the phone from droping , three sides of the silicone protective pad, flexible sponge base. 25 TYPES OF HORN SOUND: Multifunctional bike lights button is external, you can press the horn at any time. 130 decibels loud horn effectively warn passerby, vehicles. 3SAFE RIDING: Power bank bicycle lights has three high brightness beads design, more sufficient brightness, to ensure the safety of night riding. 4MULTIPLE MODES: Bicycle lights phone holder has three modes of strong light and low light burst, to meet the needs of daily operation, could be the best choice for you. 5APPLICABLE DEVICES: Bike light has a built in spring that allows it to stretch freely. Suitable for most cell phones, width adjustable 5590mm/2.23.5in, non slip and stable. 6 FOR YOU: 4 in 1 bike lights is waterproof and easy to handle for everyday or outdoor trips, and easily attaches to the bike with rubber straps.SpecificationItem Type: 4 in 1 Bike LightsMaterial: Plastic, Silicone, Electronic ComponentsBattery Type: Lithium Battery (Shipped with Built in Battery)Applicable Cell Phone Models: 4-6.4 Inches of Cell PhonesBattery Voltage: 5VBattery Capacity: 2000mAhPackage List1 x 4 in 1 Bike Light1 x Data Cable1 x Fixed Clip (With 2 x Rubber Washer)