Specifications: Model: SMH-01 Color: black Material:ABS Display type: TFT Blood oxygen measurement range: 5%-99% Blood oxygen measurement accuracy: 70-99% Pluse measurement range: 30-250BPM Power consumption: below 30mA Operating temperature: 5°C-40°C Humidity: 15%-80% Atmospheric pressure: 70kPa-106kPa Battery: 2 * AAA 1.5V alkaline batteries(Not included) Package size: 7.5 * 5.2 * 3.5cm Package weight: 37.6g Package List: 1 * Fingertip Pulse Oximeter 1 * Lanyard 1 * User Manual