Vivitar 40.5mm Close Up Macro Lens Kit Sensei SUR-4852 you can speak into the

you can speak into the unit�s built-in microphone to communicate with any authorized personnel or potential intruders at the site where the speaker unit is installed

While barlow lenses increase the eye relief of the eyepiece in use

1x RJ45 (WE/SS 8P8C connector with 2 LED indicators)

8 lb (4 kg) Weight 6 lb (2

each weighing up to 125 pounds

Vivitar 40.5mm Close Up Macro Lens Kit Sensei SUR-4852 you can speak into theDecreases Minimum Focusing Distance Includes +1, +2, +4, and +10 Strengths Provides Shorter Working Distance Combine Filters for Increased Effect 40. 5mm Front Filter Threads Includes Protective Filter Wallet A simple and convenient method for shortening your minimum focusing distance and minimum working distance, this Close Up Macro Lens Kit from Vivitar fits lenses with 40. 5mm filter threads, and enables you to photograph close up subjects more