LK87 saturimeter pulse -pulse beat blood pressure meter meter Purchase invoice: It should be requested at the same time as the order and will be sent by email. In the absence of the billing data, the tax receipt that will not be possible to cancel will be issued. Simple and convenient, small, light, easy to transport all the qualities present in this pulse oximeter. A sign appears on the display to indicate when the power of the batteries is not enough to guarantee correct operation. Automatic shutdown after 8 seconds without signal. The insertion of a finger in the Ossimeter is sufficient to have the values of oximetry and pulsations/minute after a few seconds. Two AAA type batteries guarantee measurements for about 30 hours. Batteries: 2 AAA alkaline or rechargeable batteries; 30 hour.