Features Connect up to 4 entry phones Compatible with: - E-10, E-20A, E-30 and E-40 Handsfree Phones - K-1500-7 Stainless Steel Panel Phone - K-1700-3 Handsfree Phone with Keypad - K-1900-8 Stainless Steel Phone with Keypad - Any analog touch tone phone Up to 6 different keyless entry codes per entrance Programmable "one time use" keyless entry codes Master keyless entry code for use at any entrance Optional "Privacy Number" allows only selected visitors to call from an entry phone Provides "Caller ID" and "Call Waiting ID" Produces "Call Waiting" tones Lighted doorbell switch input to activate entry phone call Two sets of normally open and normally closed contacts available for each entry phone Programmable contact activation time Auxiliary input to activate timed auxiliary contacts Realistic call progress tones Specifications Power: 120VAC / 13.8VAC 1.25A, UL listed adapter provided Dimensions: 210mm x 159mm x 45mm (8.25" x 6.25" x 1.75") Environmental: 0 degC to 32 degC (32 degF to 90 degF) with 5% to 95% non-condensing humidity Relay Contacts: 5A @ 30VDC/250VAC Ring Output: 8 REN, capable of ringing (8) 1 REN phones Talk Battery: 40V DC Connections: (30) cage clamp screw termina