Features: LCD 3 lines display. Pre-dial and edit function. Redial and pause function. Maximum 5 handsets can be registered to the same base unit, and maximum 4 bases per handset. 30 incoming numbers memories and 10 last numbers redial. 50 phone book memories with 32 digits maximum. Call transfer to other handset and intercom call between two handsets. Conference call between external call and two handsets. 5 basic ringer tones and 5 melodies ringer tones for selection. Ringing tone/earpiece/hands-free volume adjustable in 5-levels. Different melody for different call available. Alarm clock function. Tone/Pulse dialing mode can be set. Flash time 100/300/600/1000ms for selection. 16 kinds of interface languages. LCD backlight function. Auto/manual answering function. Dialing barring function. Keypad lock function. Mute function. In use and charge LED indicator. Come with a ringer amplifier 2 ringer volume to adjust, design with a switch at the side, high and low to choose to meet your needs. Battery free and flashing light design as reminder when telephone ringing. Specification: Model: D1004 Handset Size: 18x5.6x2.2cm Handset Base: 11.5x8x9.5cm Product Weight: 220g 16 System Languages:English, German, French, Italian, Spanish, Portuguese, Russian, Turkish, Greek, Ukrainian, Polish, Hungarian, Swedish, Dutch, Danish and Norwegian. 1NetworkDependent -DualmodecallerID(FSK/DTMF) -Conferencecall(externalandinternal) -Dialingbarringfunction. AC/DCAdaptor -InputVoltage:100240VAC -InputFrequency:50/60Hz -OutputVoltage:6V500mA InternalBack-UpBattery: -Rechargeablebattery:2x1.2VAAA400mAh -Talk/StandbyTime: 10Hrs/120Hrs -ChargingTime: 8Hrs Telephone Ringer Amplifier Size: 9.5 x 5.6 x 2.7cm Weight: 37g/1.3oz Color: White Volume Level: HI (70DB), LO (60DB) Suitable Connector Type: 6P2C Packing List: 1 x Handset 1 x Base 1 x Power Adaptor 1 x User Manual 2 x Rechargeable Battery 1 x Telephone Ringer Amplifier