DSC Maxsys PC4850, Telephone Entry ModuleCondition:* New Old Stock, Never Installed. No OEM Packaging. As Pictured.Additional Notes:* Supports Up to 1500 Users* Can Control up to 2 Entry Points* Connects to PC4020 Panel With 4-Wire Combus* AC Input – 16 Volt AC, 40 VA* Door Strike Transformer Connection – 8 to 24 Volt AC, 1.6 Amp* Primary Relay Outputs: 24 Volt AC, 1.6 Amp Continuous 24 Volt, 2.0 Amp Peak* Auxiliary Relay Output – 24 Volt AC, 1.6 Amp* Postal Lock Switch – 12 Volt DC, 0.25 Amp* Lithium Backup Battery For Programming Memory And Clock Included – Lasts Up to 10 Years* Speaker Impedance: 45 * Aux Output: 11.4 – 12 Volt DC, 25mA with 1.2Ah Backup 11.4 – 12 Volt DC, 200mA with 4Ah BackupDSC MaxsysPC4850