Features*; Small & lightweight design ( total 28g without batteries )*; Dual color OLED display*; Display SpO2, PR, Pulse bar and Plethysmogram*; 6 display modes*; Low power consumption, automatically power off *; Battery-low indicator*; 2 AAA alkaline or rechargeable batteries*; Accommodates widest range of finger sizes from pediatric to adult-----------------------------------------------------------Standard Accessory*; 2 AAA Alkaline batteries*; Operating manual*; Hang string
