Features: The MKS SPO2 TFT screen health monitoring module adopts advanced optical sensing technology, which can accurately measure blood oxygen saturation and pulse rate, providing users with reliable health data. Using a 32-bit ARMCortex-M0 main control chip with a 48MHz main frequency, strong computing power, and significantly improved performances. TFT screen display, clear and easy to read, adjustable brightness and contrast, suitable for different environmentsEquipped with high-precision sensors, the measurement results are accurate and reliable. Support real-time monitoring and data storage, making it convenient for users to track their health status. Simultaneously measuring blood oxygen saturation and pulse frequency not only displays digital results, but also monitors the continuous waveform of pulse in real-time. This module supports a finger clip shells, making it easy to carry and operate. Specifications: Material: Printed Circuit Board Size: Approx. 51x27mm/2.0x1.06inch Display method: TFT Blood oxygen measurement range: 60-100%, resolution 1% Blood oxygen measurement accuracy: ± 2%, less than 70%undefined Pulse measurement range: 30-250bpm, resolution 1 Pulse measurement accuracy: ± 2bpm%. Power requirements: Two AAA 1.5V alkaline batteries, capable of providing long-term continuous measurement, easy replacement, and low power consumption Package Includes: 1x MKS SPO2 TFT Screen Health Monitoring Module note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.