The HD-1 Handset Dialer is a universal keypad Touch Tone generator capable of providing DTMF signaling. The HD-1 permits access via DTMF signaling to beepers, voice mail and banking services from phone system consoles or other equipment which cannot provide Touch Tones. The HD-1 is easily installed in series with modular handsets and headsets or interfaces directly to Tip and Ring. Applications Add DTMF Signaling to Console Phones for: Beeper paging Voice mail systems Automated attendants Banking services Access control (interfaced with an RC-3 or RC-2A for door/gate control) Program Viking Hot-Line dialers and emergency phones Features Easily connects in series with handset and headsets or interfaces directly to Tip & Ring with the furnished adapter kit Provides DTMF signaling across a dry pair of wires for in-house applications Compatible with console phone auxiliary hand-set jacks Powered by 9 V battery (provided) or optional PS-1A 13.8V AC adapter "Battery O.K." LED indicator Adjustable Touch Tone volume control Switch selectable transmit (per handset wiring protocol) Optional Talk Battery adapter (PS-1A) for pre-programming Viking products such as hot-line dialers Made in the USA 1 year warranty Specifications Power: 9 Volt battery provided. Optional Viking PS-1A (120V AC/13.8V AC 1.25A UL listed adapter) Battery Life: 1 year average (under normal use) Dimensions: 152mm x 83mm x 44mm (6" x 3.25" x 1.75") Shipping Weight: .90 Kg (2 lbs.) Environmental: 0°C to 32°C (32°F to 90°F) with 5% to 95% non-condensing humidity Connections: (1) RJ11 plug, (1) RJ11 jack