... operate4. Power off automatically if no operating in 10 mins5. Battery low voltage detection functionApplication:1. Telecom engineering and maintenance2. CATV ... ,1KHz,2KHz (1310, 1550)Optical fiber categorySM , MMConnectorFCPower SupplyThree AA 1.5V battery,AC adater,9VOperating temperature(°C)-10~+60Storage temperature(°C ...