Q-series is an all new multi-sports wrist mounted heart rate monitor with cycle computer functions. Perfect for triathlon or multi-sports events heart rate can be monitored off the bike while swimming running kayaking etc. then all the usual cycle computer functions used & recorded while on the bike.Q3A has an additional built in Altimeter for current altitude data incline or accumulated ascent when cycling. Using 2.4ghz digital technology the computer receives speed & cadence data from the single ISCTec transmitter located at the bottom bracket. The head unit can also be handlebar bar mounted using the included mount. Data is stored then downloadable to PC via a USB (Universal Serial Bus) dongle &40;sold separately&41; & is compatible with Cateye&8217;s&8217; E-Train&8217; software for analysis & feedback on your training progress or race performance. Common Q series features include:&8226; 2.4 ghz ISM band digital wireless &40;ID Coded&41;&8226; Downloadable &40;USB Dongle available separately&41;&8226; 5 Heart Rate Zones with audible alarm&8226; Total weekly monthly & yearly time & distance&8226; Up to 30 stored files&8226; Handlebar mount included HRM/SPEED/CADENCE/ALTIMETER