Specifications: Material: PC+ABS Size: 118*95*65mm Color box size: 112*102*162mm Power supply: battery (not included) Type: no voice Storage temperature: -20℃~50℃ Storage humidity: 15%~90% Operating temperature: 10℃~40℃ Operating humidity: 40%~85% Pulse: (40~200) times/min Resolution: 1mmHg (0.1kPa) Accuracy: ±3mmHg (±0.4kPa) Pulse: within ±3% of reading Voltage: 3V Power consumption: 0.01W Package Included: 1pc* Hematomanometer (without battery) 1pc* Manual 1pc* Storage Box Notes: 1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from real object.