Motor Vehicle Lighting The rear lamp A8Pro adopt the latest technology and provide a wide range of cost-effective solutions to meet most of cycling warning needs. They serve as cycling rear lamp, braking light, bell, remote call & anti-theft siren. A8Pro is the updated version. It further optimizes its performance by providing options to adjust alarm sensitivity, 5 ring tones, and tone volume. Features: -Unique dome-shaped reflector to optimize visual effect and lower direct dazzle; - Accurate braking warning light to increase cycling safety; - Audio warning for wireless bell, remote call, and burglary alert; - Supports up to 5V 2A input charge, handy use at wide range of adaptors; - Dual mount system to install at saddle rail or round seat post. Specifications: - Light source: LED COB Red Light - Light Mode: 4 modes (Auto Fast Strobe & Breathing, Manual Pop Strobe& Steady) - Alarm: 115db, A8Pro has 5 tones and volume adjustable, A8 has 1 tone, not adjustable - A8Pro Battery: 800mAH, runtime approx. 8-30Hrs. (A8 Battery: 700mAH) - Controller Battery: 12V/27A battery (included), replaceable, not chargeable - Ingress protection: IP65, water splash proof. Do not submerge in water to use - Mount: saddle rail or round seat post, both brackets included - Net Weight: Lamp 66 grams; Controller: approx. 23Grams