Gel Wheelchair Cushion 16 x 16 x 2 Instant Hot Packs 10 MHz Superficial * Transducers Style:Right Ear 10 MHz Superficial * Transducers for fetal dopplers * Most popular size for vascular treatment * For vascular use (the lower the transducer number the deeper it will read) * For use with Huntleigh Models FD2 MD2 SD2 and D900 * Visual Signaling Top mounted flashing lights helps to verify that the monitor is armed (slow green flash) and locate the monitor when alarming (fast red flash) perfect for nighttime use * Secures easily to wheelchair with 12 tie straps * Offering great versatility the Gel U Seat Lite provides comfort to almost all wheelchair users