Profoon PDX-7620. Phonebook capacity: 50 entries. Frequency band: 0.00188 - 0.0019 GHz. Operating temperature range (T-T): 10 - 40 °C, Storage temperature range (T-T): -20 - 60 °C. Battery type: AAA/R03, Talk time: 10 h, Standby time: 150 h