Sleep fairy equipment Storage data: over 80 hours data Communication: usb 2.0 Spo2: 40% - 100% Pulse rate: 20 ¡§c 240 bpm Battery rechargeable lithium battery: 1700mah Continuous recording time: over 30 hours Screen: 2.8 inch tft Features Compact, light and convenient; Extremely easy to operate with one switch; Huge display, 2.8¡¡à tft screen, showing all channels, include the ambient temperature and recording time; Reliably providing extensive, detailed and accurate sleep clinical data; Suitable for home sleep testing and ambulatory use; Sophisticated scoring and diagnostic report software; Link to any cpap device to titrate patient¡¡¥s pressure; Dimensions: 75mml x 125mmw x 24mmh Weight: 200g with battery