Trantec S5.5W UHF aerobics system features the HM66 headset microphone which has been designed with the sports and aerobics industry in mind - therefore it is built to withstand the everyday rigours of an active lifestyle. Trantec S5.5W has 35MHz of bandwidth that will enable you to run up to 24 channels simultaneously at a price you will find hard to match. S5.5W also features easy set-up with the frequency scan facility, allowing more time for your presentation or workout class!