Specification Dimensions: 75mml x 125mmw x 24mmh Weight: 200g with battery 9 channels: air flow, snore, spo2, pulse rate, body position, body movement, respiratory effort, cpap pressure, ambient Spo2: 40% - 100% Pulse rate: 20 ¡¡ìc 240 bpm Battery rechargeable lithium battery: 1700mah Continuous recording time: over 30 hours Screen: 2.8 inch tft Features 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