Description: 1) Pocket Doppler 2) With big LCD display 3) Built-in speaker 4) Blue Backlight 5) Audio output can connect recorder 6) Automatic switch-off 7) Two FHR modes: real-time and average 8) Battery energy Indication 9) Two colour of main: pink and blue Specification: Ultrasonic Frequency: 2.5 MHz Dimension: 100( L) * 30( W) * 135( H) mm Weight : 0.5k Continuous work time: 8 hours Standard Configuration 1) Main Unit ( with 2.5MHz probe) 2) Rechargeable batteries ( 1.2VX3) 3) Charger 4) Service Manual 5) Export case