Get more out of your workouts! The world-famous SW-801 Yamax Digiwalker pedometer is a four-function model that measures steps distance calories and speed. The speed meter calculates your average walking speed every 10-20 seconds. A security strap and instructions are included. World-famous Digiwalker pedometer engine. Security strap and instructions included. Measures: steps distance calories speed. Clip not included. Battery: LR-44 type. Battery life: Approximately 3 years. Dimensions: 50mm W x 38mm H x 14mm D.