Wireless finger heart rate monitor. • Cardiogram graph, average heart rate and blood oxygen measurement. • Measurement by infrared tunnel. • Works with two AAA batteries. • Includes 13 cm long transport lanyard. Interi Wireless finger heart rate monitor. • Cardiogram graph, average heart rate and blood oxygen measurement. • Measurement by infrared tunnel. • Works with two AAA batteries. • Includes 13 cm long transport lanyard. Interior Material: Thermoplastic; Alloy: Metal; pvc;; White color; Blue