This bicycle taillight features intelligent alarm bell， bright lighting and USB charging functions， great addition for most bikes.

Features:
Bicycle intelligent alarm taillight.
Taillights COB high light beads， brightness switches among three lighting modes (fast / moderate / slow flashing).
Smart alert and anti-theft design， ultra-high decibel siren up to 120 decibels， once the bicycle senses touch vibration， it will emit piercing alarm sound to frighten thieves.
Support USB charging， 2-3 hours charging time， normal riding use up to 15 days， standby up to 30 days.
IP67 waterproof， convenient for riding in rainy days.
Easy to install under bicycle saddle.
Suitable for most bikes， such as mountain bike， road bike， ladies bike， ordinary bike， electric bike， etc.

Specifications:
Material: ABS
Waterproof Rating: IP67
Lamp beads: COB light source
Battery: 3.7V 800mA lithium battery
Charging Time: 2-3 hours
Working Time: About 15 days
Standby Time: About 30 days
Item Size: 8.5 * 4 * 2cm / 3.35 * 1.57 * 0.79in
Item Weight: 51.6g / 1.82oz
Package Size: 21 * 10.8 * 3.2cm / 8.27 * 4.25 * 1.26in
Package Weight: 138g / 4.87oz

Package List:
1 * Bike Taillight
2 * Hex Wrench
2 * Screw
1 * Taillight Mount
1 * USB Charging Cable
1 * User Manual (Chinese / English)