Fingertip Pulse Oximeter For Children Uses Cartoon Appearance Design Reducing The Fear Of Children Small Size And Lightweight Design Will Not Cause Too Much Pressure On Children's Fingers Oled Screen 4-direction Display Pule Bar Plethysmogram Parameters; Spo2 Pr Low Battery Prompt Takes 2 Aaa Batteries (included) 49mm L X 28mm W X 28mm H Weight 35g (<2 Oz) Pediatric Pulse Oximeter Can Be Used On The Finger Thickness Between 5mm-19mm