Model Number: Bicycle LED Light Mounting Placement: Seatpost Power Supply: Battery high quality Rugged, highly extensible Button Function: Mode selecting & Off Lifespan: . 100000 3 lighting modes: all-optical, strobe, SOS, can be easily controlled Waterproof and waterproof shower design, not afraid of rain Install or remove any tool within 3 seconds One-Press switch design, simple operation Powered by 2 CR2032 batteries (including battery) All about sustainable use of light for about 3 hours This item can be used as headlights and rear lights colour:Black + red & Random color Material:ABS & Plastic Bike Taillights: size:3.5 x 4CM Headlight: Light Size: 5.7cm x 4.4cm x 4.2cm Package Contents: 1 x Bike Taillights 1 x Headlight Note: Random color, don't accept the specified color. Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. 1 pcs Bike Taillights & 1 pcs Headlight Item Type: light lamp & bicycle light Battery built-in(include 2x2032 Li Battery) LED Quantity: 1pcs Light Color: White