Feature:1. MULTIPLE FUNCTIONS: Wireless GMS desk phone support dual SIM cards and GSM 850, 900, 1800, 1900 frequency, caller ID; Storage 50 missed call or received calls and the last 10 dialed number; 8 speed dial keys and redial function, support three way conference call and so on2. LARGE STORAGE CAPACITY: Your wireless phone has a powerful phone book which can store 300 names or contact numbers. And the memory storage capacity of your SIM card depend on your SIM or RUIM card provider. The phone design with 2 SIM cards slots3. EXTERNAL ANTENNA: External antenna make the signal receive of wireless desk phone more stable, get rid of the trouble of disconnection, ensure every call sound quality clear, bring unimpeded communicating4. EASY TO SET UP: 5 levels of large display contrast adjustable. Redial, speed dial, hands free, ringer volume adjustable functions are all available in this telephone. What is more, FM radio, MP3 and voice recorder function is included5. POWERFUL BATTERY: Wireless GMS desk phone built in 1000mAh Li ion battery provide up to 24hrs of talk time and 7 days standby time(depending on network environment)Specification:Item Type: Wireless Desk PhoneModel: DDK995+Size: Approx. 19 x 16.5 x 2cm / 7.5 x 6.5 x 0.8inBattery: 1000mAhStandby Time: 7 DaysTalk Time: 24 HoursCharging Time: 6 HoursPower Consumption: Static