There is a safety warning light behind the bicycle seat cushion, which is waterproof. Provide you with the best view of safe riding. Stop wasting money and time to buy taillights and solve the trouble of installing taillights. Enjoy your journey and no longer worry about accidents or miscompatible withtunes in the dark.Comcompatible withtable and spacious bicycle seat: large ventilated ergonomic passages can cool the air circulation and release pressure. The ergonomic design fits the buttocks more closely and does not affect the movement of the thighs. The humanized hollow and breathable design relieves the pressure of privacy. Say goodbye to the pain and enjoy the fun of riding.Soft and elastic: non-slip, wear-resistant, the best protection compatible with the hips. The comcompatible withtable bicycle seat cushion is made of thickened and widened high-density memory foam. Scratch-resistant, wear-resistant, durable, and better protect the hips While enjoying the fun of riding.Name: Bicycle SaddleBicycle saddle: with tail lightColour: Black BlueMaterial: PVC+high elastic foam materialPackage Contents:1 x Bicycle seatOnly the above package content, other products are not included.Note: Light shooting 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.