Oxygen Monitor, Measurement Percentage (Minimum) 0.1 Percent, Accuracy +/-.1 Percent, Minimum Measurement 1,000, Battery Size AA, Includes (2) AA Batteries, 6 1/2 in Rubber Hose, Carry Strap, Carrying Case, Flow Adapter, Rubber Vacuum Bulb, Stainless Steel Probe, Display Type LCD, Features Hermetically Sealed Housing, Quick Response Time, Includes Batteries Yes, Number of Required Batteries 2, Power Source Battery, Probe Cord Length 6.5 ft