Fetal dopplers

Kat • 3 👩🏻👧🏻👧🏻 & 🌈 👧🏻 after ttc for 2 yrs! 🌈👶🏻 #5 otw! (10wk &14wk miscarriage).
I'm giving in and purchasing a fetal Doppler. Which brands do you suggest and how early were you able to hear a heartbeat? 11w5d currently. Thanks in advance, dolls. Xo