Dear Sir Madam, Position:Front Light Type:LEDs Power Supply:Battery Mounting Placement:Handlebar Material:Aviation Aluminum+ABS Product name:Bike Light Set Function:LED Front Bike Light Brightless:500LM(T6) Single Light Weight:50g Light Size:28*28*32mm Battery Weight:220g Battery Size:42*52mm Voltage:3.0-5.5V Length of