CT-CID803 PLUS Caller ID Box Call Blocker Stop Nuisance Calls Devices Call ID LCD Screen Display with 1500 Numbers Capacity Stoping All Cold Calls for Fixed Phones Antique Landline Telephone (Random Delivery in New and Old Model) This device is a kind of powerful multi-function call blocker which can block numbers added to blacklist, with the call Blocker, your world finally get quiet. * Note: 1. This product requires Caller service from your network provider. All calls without Caller will be rejected directly. 2. The new and old model differ in pattern, and they are in random delivery. CT-CID803 PLUS Caller ID Box Call Blocker Stop Nuisance Calls Devices Call ID LCD Screen Display with 1500 Numbers Capacity Stoping All Cold Calls for Fixed Phones Antique Landline Telephone (Random Delivery in New and Old Model): Manually enter or remove numbers to/from the Blocking list.This will block all calls without caller ID.You can choose 1-Ring or 0-Ring for blocked calls.Blocks the Area Code or the first few digits of a incoming calling number. (Hint: Limited to 10 Groups)Block nuisance or unwanted calls to 1000-1500 groups.Todeleteablockednumbers.Hit"BLOCK"buttonfirst,thenhitLeftorRightarrowtoviewtheblacklist. Select the number and press DELETEtwicequickly. TheDONEshouldshowindicatingtheremovalofthenumberfromtheblockedcalls. Specifications: Type: Caller Blocker Material: ABS LCD Display: Backlight Product weight: Approx.87g / 3.1oz Package size: Approx.10.2 * 9.5 * 5cm / 4 * 3.7 * 2in Model: CT-CID803 PLUS Product size: Approx.10 * 8.6 * 4.4cm / 3.9 * 3.2 * 1.7in Keys: SET, OUT, BLACKLIST, REMOVE, UP / DOWN Color: Black Package weight: Approx.124g / 4.4oz Package List: 1 * User Manual (English) 1 * Network Cable 1 * Caller Blocker 1500 numbers memories for blacklist. Reviewing and deleting of numbers in blacklist. Block unwanted callers. Block unwanted callers.Blocking Function: Block a number by entering #2 on any telephone handset connected to the telephone base. LCD display: Date, Time and Week. Reviwing of incoming and outgoing calls by UP/DOWN. LCD display: Date, Time and Week.