Russia Caller ID Phone Features FSK and DTMF system compatible 12-Digit display modes: General display mode, for a smaller LCD 96 incoming call memories, each with 12-digit calling number, calling date and calling time 15 outgoing call memories, each with random-digit dialing number and duration of call 5 one-touch memories, each with 12-digit number 5-digit area code LCD lighteness adjustment: 8 rank digit long distance code 32-digit on hook pre-dialing LCD contrast adjustment Music hold function Long distance call lock One-key redial;Anti-call-theft function 4-step digital speaker volume control 4-step digital ringer volume control Pulse and tone dialing Flash time: 1000ms/600ms/300ms/180ms/120ms/100ms/ selectable Operating temperature ranges between: Low power consumption: --Less than 1mA during work mode --Typically 50A during sleep mode