Large Button Telephone with Speaker Phone and Voice Amp Walkers Two Button 1 Tank Capacity*: 10 gal Jobst Relief 20 30 Knee Hi 1 Tank Capacity*: 10 gal (37 L) Temperature Range 160¯ 165¯F (71¯ 74¯C) Thermal Cut Out Temperature: 180¯ 185¯F (82¯ 85¯C) Temperature Accuracy: + 10% Heat Up Time to 160¯F (71¯C): 4 Hrs Cool Down Time from 160¯F (71¯C): 4 Hrs Fiberglass Insulation: Yes he Advanced Series Alarm is is a premium alarm that is easy to operate reliable and offers superior features to other alarms currently on the market * Ergonomically designed with the facility in mind this alarm is reliable efficient and quick to respond * It is compatible with most manufacture Large Button Desktop telephone with voice amplification and speaker phone * Large 1 ´ x 1 button with 1 high numbers makes this an easily dialed phone for the elderly or anyone who has trouble with the size of the buttons on a regular phone * 10 two touch memory speaker phone voice amplification flash and last number redial * Bright ringer light * On off ringer switch * Fully modular * 90 day warranty * Measures 6 5 wide x 9 long x 2