◇Single 1.5V battery power supply
◇Built-in low voltage detect function
  TT5660A: 1.30 ±0.05 V
  TT5660B: 1.35 ±0.05 V
◇Provide fever alarm function
◇Automatically turn-off function
◇Buzzer alarm indicates ON/OFF button pushes
◇Buzzer alarm indicates no increase in temperature
◇Buzzer alarm indicates fever detected
◇Within buzzer alarm interval disable peak temperature latch
◇Bonding option read in the biomedical range of 32.0℃ to 42.0℃ or 32.0℃ to 

  44.0℃
◇Bonding option read in the biomedical range of 89.6℉ to 107.6℉ or 89.6℉ to

  111.2℉
◇Bonding option memory function
◇Bonding option ℃/℉ changeable or not change mode
◇When ℃/℉ changeable mode, push ON/OFF button to select ℃/℉ and bonding option 

  ℃ or ℉ when power on initial
◇Bonding option buzzer alarm frequency 4K/5.3K/6.4K/8KHz