Technical Specifications:

• Power: DC 3V, 2 AA alkaline batteries
• Consumption: Approx. 90 mA with no signal input
• Battery life: 5 hours or more with max. sound volume
• Transducer: 20 mm DIAM
• Transducer frequency: 2.25 MHz
• Method: Pulsed wave, repetition rate of approx. 4.3 kHz
• Oscillation Output: 8V p-p or less
• Freq. Characteristics: 230 Hz +/- 50 Hz to 800 +/- 150 Hz, -6dB
• Max. speaker output: Impedance: 64 ohms, max. output: approx. 125 mW
• Speaker: 45 mm DIAM
• Headset: Cuts off speaker
• LCD dimensions: Display area: H 10 mm x W 30 mm
• LCD display: 3 digits, 7 segments each, heart beat mark, low attery, sound volume level
• Heart rate range: 60 to 240 BPM +/- 3%
• Buttons: Power/Freeze power ON/OFF
  Pressing longer than 2 sec. turns the unit OFF
  Freeze ON/OFF by pressing less than 2 sec.
  Volume control: Press to switch from low to high volume; press longer than 2 sec. to show battery level
• Dimensions: approx. 140 (H) x 45 (W) x 30 (D) mm
• Weight: 220 grams or less including battery
• Accessories: Included: ultrasonic gel, batteries (2), strap, carry pouch with belt clip
  Optional: headset