Specifications: 800 lumens bicycle headlights provide you with an excellent view and keep a safe distance in the dark. A bicycle speedometer can accurately record speed and distance, which can help you have more riding fun or easily achieve your fitness goals. The 120dB speaker can provide clear warnings for passersby and cars. Please feel free to ride with this wonderful gadget and feel your own speed! Item Name: Bicycle Horn Light Material: ABS Headlight Brightness: 800 Lumens Lighting Mode: High/Low/Flash Effective Range: 200M Electronic Horn: 120 dB (3 modes) Light Working Time: 5Hrs / 10Hrs Battery: 4000 mAh Battery (Included) Charging Time: 4 hours Sensor Battery: Button Battery (Included) Sensor Working Time: 12 Months, 1 Hour/Day Waterproof Rating: IP65 Features: Durable, Useful, Convenient Size: 11cm x 4cm x 3.5cm/4.33" x 1.57" x 1.38" (Approx.)