... ST3306A optical fiber identifier is powered by a 9V alkaline battery. FeaturesØ Efficiently identifies the traffic direction and ... Power Reading-50~+0dBmSignal Frequency270Hz, 1kHz, 2kHzPower SupplyOne 9V Alkaline batteryOperating Temperature-10+60Storage Temperature-25+70Dimension (mm ... Fiber Identifier, 4pcs adapter heads, Alkaline battery, Instruction Manual, Cotton Tampon and Soft Carrying case.