... to maintain 3) Clear voice and no noise 4) Caller ID (CLI display) 5) Stores 10 received / 10 dialed ... 6) Authentic signal, battery volume, time and date display 6) Built-in back-up Li-ion battery: ... Reception: 1,805 - 1,880MHz 3) Channel space: 200KHz 4) Max power: 0.25W / 0.5W 5) Consumptiona) ... and home use 3) For rural and mountainous areas 4) For mobile carriages, like ships, automobiles and trains ...