51 Speedshop Aerobar Cradle and Pad General Accessories-Eyewear their strongest selling point is

their strongest selling point is definitely the boost they provide while they're going

but you can still use it as a standalone bike light

SPD - Flat

Linear resistance boosts workout intensity to match each pedal stroke and gear click

For Triathlon

51 Speedshop Aerobar Cradle and Pad General Accessories-Eyewear their strongest selling point isArm Pad Large surface area to disperse pressure. Proprietary two part injection foam pad design. 10mm pad thickness. Radiused to match perfectly to pad holder. Universal Cup Anatomic shape to securely cradle the arm. Universal bolt pattern works across most flat tow bolt mounting systems. Includes M4, M5, M6 stainless steel bolt & washer kit. Carbon reinforced nylon cup construction.