Features	CRM	CRdM
Functionality	Measures Compression Rate (indicated by lights)	Measures Compression Rate (indicated by lights) and Compression Depth (audible beep)
Wrist Band	Slap-Style Latex Free Silicone Rubber	Tongue & Buckle Style Latex-Free Silicone Rubber
Power on/off Function	Conventional Button	Touch-Face Technology
Auto-Off	Yes, after 3 minutes of inactivity	Yes, after 2 minutes of inactivity
Power Source	Replaceable Battery CR2032 (Battery included)	Permanent Rechargeable Lithium Battery (USB charging cord included)
Battery Life	Varies with usage	3-4 hours
Carry Case	Blue EVA Carry Case	Black EVA Carry Case
Warranty	One Year	One Year