Kindly noted before using:
Callany Best Landline Call blocker suits for kinds of landline,also suit for VOIP landline.
Needs two AAA batteries,not line powered
Two installations:series and parallel connection.It needs a connected RJ11 cable(we provide) with series connection.However it needs one RJ11 cable and a splitter(not provide,will provide it in the future,and the information will be updated when it arrived)

Main function:
1. FSK/DTMF dual system compatible telephone phone call blocker, 16 bits number can display on LCD.
2. Sets of 8-16 digits block phone numbers stored in Separated storage won't be lost when cut up the electricity from the call blocker
3. 50 sets of 16 digits income phone numbers stored in Separated storage won't be lost when cut up the electricity
4. 50 sets of 16 digits outgoing phone numbers stored in Separated storage won't be lost when cut up the electricity
5. 4 levels of brightness can be adjusted
6. Separated storage

• Simple, one-touch programming to block annoying phone calls - FOREVER!
• Block 1000~1500 numbers
• permanent storage for incoming and outgoing calls
• 4 levels of Brightness Adjustable
• No batteries required! Units run on the power from the phone line. 1 Year Warranty is available from seller

Simple, one-touch programming to block annoying phone calls - FOREVER!Cheeta