Comes with only one of these heads :1. Convex 3.2 mhz r502. Convex 3.3 mhz r503. Linear 7.5 mhz l404. Micro convex 6.5 mhz r155. Linear 7.5 mhz l256. Transvaginal 6.5 mhz r10 technical specifications :- transducer frequency : 2-11mhz linear- convex 64 elements - 128 elements -depth : 40mm 200 mm -platform : android, window modes : b, b&m, 2b, 4b -gray level : 256 -transducer frequency : 2-11mhz -max scanning depth : 310mm- map leftright reverse updown reverse -wifi connect to any android or window system xp. 7. 8. 10- cine-loop : based on the memory of the android or windows device.- zoom : max 10 timesb mode : distance, angle, area, volume, trace length, distance ratio, area ratio, histogramm mode : distance, time, slope, heart rate color power pw mode : d velocity, d trace, psed application package : abdomen, small parts, vascular, obstetrics, gynecology, cardiology, neurology, urology, orthopedics, anesthesia, others.- power supply : 12v 1.5a -battery lifetime : 6-8 hours -net weight : 365g- waterproof level : ipx6 -multiple frequency probes - convex probe -probe main host (17cm*5.8cm*2.4cm)-- 30 trees planted for one purchased item