** The AS608 comes in a basic and an extended version. This is the basic version. ** The AS608 / AS608e portable audiometer is ideal for schools, industry and primary medical practices or wherever quick hearing screening evaluations are performed. Easy to use, it requires minimal training prior to use and offers calibrated pure tone and warble tone stimuli over a wide range of frequencies. Package Contents 1 x AS608 Basic Version Portable Audiometer 1 x Carry Bag 1 x Headphones (DD45 RE7 or DD65 V2) 1 x Patient Response Button 1 x AU Power Cable Quick Hearing Screening Made Real A portable audiometer made for schools, industry and primary medical practices or wherever quick hearing screening evaluations are performed. Weighs less than 1.6 kg/3.5 lbs Battery status indicator Operates with 3 AA batteries Dedicated carrying bag Portable and Easy to Use Portable The AS608 includes a dedicated, lightweight carrying bag with a shoulder strap that will accommodate the AS608, headset, and audiogram charts. Batteries or Power Supply The AS608 operates with three standard AA batteries or a medically approved external power supply. Typical battery life is six months. Headphones You can choose between the DD45 RE7 or the DD65 V2 headphones.