... intermittently audible tone is activated. The FI2000 optical fiber identifier also recognize the modulation like,270Hz,1kHz and ... Easy-to-replace adapters. -Durable metal housing and quality construction. -Lower power indication. Specifications Type SH-FI2000 Identified ... 200 Standard Packages MODEL INCLUDES SH-FI2000 SH-FI2000 Optical Fiber Identifier, 4pcs adapter heads, Sunshade, Alkaline battery, ...