JY-401-A1 is a rechargeable Bicycle Rear Light with 1 Super Bright Red LED, it’s enhance the safety aspect, as you are better seem by others.

• Bicycle Rear Light

• 1 Super Bright Red LED 

• With PCM(power circuit module), providing the over-charge detection(OVP) & over-discharge detection(UVP).

• With USB Rechargeable Cable

• Conform to CE/StVZO standard

• Function: On-Off

• Spec: Fit for seat post diameter Ф25.4-Ф31.8mm

• Battery: 902030 Lithium battery 3.7V/480mAh

• Weight: 51g

• Size: 60x22x32mm

• Color: Black

• Waterproof: IPX4