Features: The elastic clip can not be smashed. Shock absorbing gasket does not hurt the phone The bracket is equipped with a shock absorbing pad to protect the phone case and prevents scratching. Highlight headlights, night riding protection, double lamp bead lighting design, to ensure safe riding at night. Mobile charging, convenient and fasted, built-in 2000 mAh large-capacity battery, you want to charge whenever you want. USB charging, riding more convenient, comes with USB charging, can adapt to a variety of USB chargers. 130 decibel speakers, bid farewell to shouting, up to 130 decibels sound effectively warning passers-by, vehicles.Speicifications: Material: ABS Color: black, black and red, black and blue (optional) Battery capacity: 2000mAh / 4000mAh (optional) Lumen: 250 lumens Charging time: 5 hours Output current: 0.7A Lighting mode: Strong light - Weak light - fasted flash Support range for mobile phone: 4 - 6.3 inches Speaker decibel: 130 decibels Sound mode: 5 sound modes Item size: 125 * 52mm / 4.9 * 2.0in Item weight: 157g / 5.5ounce Package size: 158 * 115 * 60mm / 6.2 * 4.5 * 2.4 Package weight: 273g / 9.6ounce (2000mAh) 281g / 9.9ounce (4000mAh)Packing List: 1 * Bike Light