piece Color: Black Blood oxygen saturation measurement range: 70%-99% Pulse rate measurement range: 30 BPM ~ 240 BPM Blood oxygen saturation measurement accuracy: 2% in the range of 70%-99%, 70% undefined Pulse rate measurement accuracy: 1BPM or 1% of the measured value (depending on the value SpO2 Resolution: SpO2 1% Blood Perfusion Index: SpO2 1 % Indice de perfusion sanguine : 0.2%, 0.1% Power consumption: less than 30mA Automatic shutdown: when no finger is inserted, it will automatically shut down in 8 seconds Working temperature: 5~40 Storage humidity: 15%~80% 10%~80% storage during work Atmospheric pressure: 70Kpa~106Kpa Battery model: 2 x 1.5V (2 AAA alkaline batteries, the product does not contain batteries) Material: ABS + PC Product size: 65*30*30mmYeuri