Features Easy access to ears - Stethoscope use is easier with the unique shape of our S-Series headcovers Maintenance-free disposable hood saves you time cleaning while providing a wide field of view Multiple airflow rates put you in control of your comfort Easy-to-clean belt saves time and effort paving the way for more productivity Intuitive, coloured touchpoints plus visual and audible lowflow indicators help make the TR-300+easy to use Multi-speed powered air turbo with a battery that offers long run time, less charge time and, ultimately, reduced downtime What's in the box? S-133L Headcover BT-30 Length Adjusting Breathing Tube BT-922 Breathing Tube Cover TR-302E+ Powered Air Turbo TR-327 Easy Clean Belt TR-332 High Capacity Battery TR-341E Battery Charger Kit TR-3712E (P) Filter TR-3600 Prefilter TR-971 Airflow Indicator