Check the listing for details. Telephone Line Auto Hang Up Box. Color: White, Condition: New. Listed at 60.00 USD. NO IN STOCK TILL MID NOV2020 Key Specifications/Special Features: Auto Hang Up Box FC-0401 This box will automatically release the line if the phone is not put down well or if it is off hook and the line is busy allowing a incoming call... To see how it work click on link below user manual https://www.future-call.com/images/usermanuals/FC-0401%20User%20Manual%2020170805.pdf Auto Hang Up Box With Timer Ringer with LED Visual LightGreen LED Lights and sound when phone is off hook (Handset is not on hook)Adjustable timer 15Minutes, 30Minutes ,60Minutes or unlimited Minutes Loud telephone ringer 95dba Adjustable ringer switch Adjustable tone switch Very bright LED Works on PSTN / VOIP / Cable lines Uses Regular RJ11 plugs A/C Adaptor Supplied Desk and wall mountable Connects easily to telephone FCC Approved Color White Dimensions in inches L 4 W 4 H 2