Aiphone JSS1A – 3.5" Video Intercom System The JS Series is an ideal video doorbell for budget-conscience homeowners or small business owners. This high-quality, low-cost system is easily installed. Door station (JS-DA) is equipped with microphone and camera; master station (JS-1MD) equipped with microphone, speaker, and 3-1/2” color LCD screen. Simple operation, slim and stylish design Video intercom system, expandable to two video monitors ( add JS-1HD sub master ) and with door release Features Clearly identify visitors without guessing who is at the door with a 3-1/2” color LCD screen Conveniently unlock the door with a push of a button Pack includes: 1 x JS-DA Surface mount door station 1 x JS-1MD Handsfree Master station 1 x PS2420 24V power supply Optional 1 x JS-1HD Handsfree Sub station ( Max 1 per system ) EL12S AC Door Lock Specifications JS-DA Video Door Station Power Supply Supplied from master station Camera Complementary metal oxide semiconductor ( CMOS ) Dimensions 129 (H) x 97 (W) x 35 (D) mm Weight Approx 200g Water / Dust Protection Class IP54 JS-1MD Master Station / JS-1HD Sub Master Station Power Supply 24V DC Display 3.5 inch TFT color LCD Monitor Dimensions 129 (H) x 97 (W) x 35 (D) mm Weight Approx 320g ( JS-1MD ) 310g ( JS-1HD ) Consumption JS-1MD: 225mA (max) JS-1HD: 115mA (max)