Mudder LED Bike Taillight Super Bright, Built-in Battery and USB Rechargeable, 500 Foot Visibility Range, Can Be Used on Front or Back and Street Mountain Children Bike, Installs in Seconds, No Tools Needed, Amazing Safety Features, Water Resistant and Red Barrel-shaped

Specifications
Light Output: LED(Red)
Battery Configuration: Built-in Li-ion battery, charged by USB cable( included)
3 Mode: High(20 lumen,4 hours)>Low(5 lumen, 12 hours)>Flash(20 lumen, 8 hours)
Full charge time: 2.5 hours
Application scope: pole or bar with diameter between 0.75 and 1.26 inch(1.9 and 3.2 cm)
Switch Location: Side-cap to change the mode
Switch Type: Click
Material: Silicone & Plastic
Color: Red
Water Resistance: Impervious to rainfall but not please avoid submerging it in water
Size: 2.17"x1.57"x1.38" / 5.5cm x 4cm x 3.5cm

Packing list
1 x USB Bike light
1 x USB cable (38cm)