1. All brael dopplers have excellent sensitivity. 2. We offer the most advanced fetal doppler available today: fd-10d - compact with built-in transducer and speaker. 3. Special wide angle probe - for fast detecting of fetal heart. 4. Automatic volume control - users have constant volume indepedent of the heart signal. Very comfortable for user. 5. High quality sound - we use special filters and speakers. 6. Auto and manual count of the heart rate 7. The longest life of batteries: 16 (fd-10d) to 32 (udt-20d) hours.
