The Practi-CRM® Compression Rate Monitor by WNL Products has been designed to measure compression rate when practicing CPR on a manikin. The WLCRM is worn on the students’ wrist, and a red diode lights up when compressions are below 100 CPM or above 120 CPM. When the compression rate is between 100 and 120 CPM, the recommended compression rate, the green diode lights up, allowing users to self-check their compression rate. A flexible wristband allows for its use on any size wrist and may be used with any training manikin. Practi-CRM CPR Monitor by WNL Products