Feature: 1. Simple operation, PON light source is suitable for various test environments, absolute power dBm and relative dB display. 2. With soft rubber protective sleeve, anti-fall and wear-resistant. 3. Handheld stable light source optical power meter, high precision. 4. The PON light source is 1310/ 1550nm, and the conventional wavelength is 1310‑1550nm. 5. Specify a standard operating wavelength into the range from min to maximum in this wavelength range designed optical power meter can work under the specified index. Specification: Item Type: Light Source Optical Power Meter Conventional Wavelength: 1310-1550nm PON Light Source: 1310 / 1550nm Probe Range: IngaAs Output Optical Power: -7 / -7 Connector: SC Modulation: CW / 270 / 1K / 2K Working Temperature: -10 ～ 60 ℃ Storage Temperature: -25 ～ 70 ℃ Automatic Shutdown Time: 10min Power Supply: 3 x AA batteries (without batteries). Package List: 1 x Optical Power Meter 1 x Adapter 1 x Shoulder Strap Accessories 1 x Cloth Bag Note: 1. Avoid looking directly at the output port when working, the laser will hurt your eyes.2. If you don't use it for a long time, please use a dust cap to protect the output port3. Don't use it for a long time, please remove the battery in time to avoid damage to the battery shrapnel4. Do not disassemble the meter by yourself to avoid more serious failures