... , the intermittently audible tone is activated. The FI2000 optical fiber identifier also recognize the modulation like,270Hz,1kHz and 2kHz ... 0.9, Ø2.0 and Ø3.0. The FI2000 optical fiber identifier is powered by a 9V alkaline battery. Features -Easy- ... g) 200 Standard Packages MODEL INCLUDES SH-FI2000 SH-FI2000 Optical Fiber Identifier, 4pcs adapter heads, Sunshade, Alkaline battery, User Manual, ...