Features： 1、SPECIAL FOAM LAYER: Bike saddle is made of special foam layer that fits your body ly, ensuring comfort by decompression, high elasticity and easy riding. 2、WATERPROOF TAIL LIGHT: Bicycle seat is designed with a waterproof bright tail light for extra visibility and safety at night or when it rains, with super bright LED lights. 3、5 LIGHTING MODES: Bike saddle pad has 5 lighting modes to provide optimal visibility for safe riding. Working time up to 36 hours ("stable" mode). 4、UNIFORM FORCE: Bike saddle cushion provides even force and increased contact area, with an upturned design that wraps around the hips for more even force. 5、STREAMLINED DESIGN: Bike seat has a streamlined, ergonomic design with a narrow frontal design to prevent leg friction and allow thighs to move freely while riding. 6、THICKENED PU SURFACE: Bike seat cushion with thickened PU surface, with waterproof, not afraid of rain, and do not have to worry about getting wet inside. Specification： Item Type: Bike Seat Cushion Material: PU Leather, Sponge, ABS Battery Type: Lithium Battery (Shipped With Built In Battery) Battery Capacity: 500mAh Voltage: 3.7V Package List： 1 x Bike Seat Cushion 1 x Data Cable