Product Use: 1. Simple and Convenient to use. 2. Display Format: OLED SPO2 & Pulse Rate Display. 3. Low Power consumption. 4. Can Be Used Continuously for up to 30 hrs on two AAA battries. 5. Automatic Power Off when no signal is detected for 8 secs. 6. Visual window indication for low battery. 7. Individually packed. 8. Available with oximeter, pair of batteries & one strap to hang the machine on the rack.