Two Parameters:SPO2, Pulse Rate.

Small, light, easy for carrying and handling;

Brightness LED displays, easy to read, and the brightness can be adjusted;

Built-in Li-ion rechargeable battery; which is to be charged by connecting USB power cable to PC,longtime operating time(Can operate 15 hours with fully charged battery);

Audio and visual alarm,sensor-off alarm, alarm limit can be set;

Automatic Power-off within 3 minutes;