A theft-detection assembly for detecting the theft of an item, the theft-detection assembly comprising: - a wireless power transmitter configured to broadcast electromagnetic waves within a given area; - a locator device (100; 200) configured to be associated with said item and comprising a wireless power receiver (111; 211) configured to receive said electromagnetic waves, said locator device (100; 200) further comprising an actuating unit (114, 116; 214, 216) and an alarm unit (117; 217), wherein: - the actuating unit (114, 116; 214, 216) is connected to said wireless power receiver (111; 211) and is configured to, in the absence of said electromagnetic waves, actuate the alarm unit (117; 217); and the alarm unit (117; 217) comprises a radio module (117; 217) configured to, upon actuation, transmit an alarm message over a wireless communication network, wherein said locator device (100; 200) comprises a battery (112; 212) connected to said wireless power receiver (111; 211) and wherein said wireless power receiver (111; 211) is an RF energy harvesting device configured to, upon reception of said electromagnetic waves, generate an electric current and provide said electric current to continuously recharge said battery (112; 212), and wherein said actuating unit comprises a transistor (114; 214), whose gate is connected to said wireless power receiver (111; 211), and an opto-isolator (116; 216) connected to said transistor (114; 214) and to said radio module (117; 217). - a wireless power transmitter configured to broadcast electromagnetic waves within a given area; - a locator device (100; 200) configured to be associated with said item and comprising a wireless power receiver (111; 211) configured to receive said electromagnetic waves, said locator device (100; 200) further comprising an actuating unit (114, 116; 214, 216) and an alarm unit (117; 217), wherein: - the actuating unit (114, 116; 214, 216) is connected to said wireless power receiver (111; 211) and is configured to, in the absence of said electromagnetic waves, actuate the alarm unit (117; 217); and the alarm unit (117; 217) comprises a radio module (117; 217) configured to, upon actuation, transmit an alarm message over a wireless communication network, wherein said locator device (100; 200) comprises a battery (112; 212) connected to said wireless power receiver (111; 211) and wherein said wireless power receiver (111; 211) is an RF energy harvesting device configured to, upon reception of said electromagnetic waves, generate an electric current and provide said electric current to continuously recharge said battery (112; 212), and wherein said actuating unit comprises a transistor (114; 214), whose gate is connected to said wireless power receiver (111; 211), and an opto-isolator (116; 216) connected to said transistor (114; 214) and to said radio module (117; 217). the alarm unit (117; 217) comprises a radio module (117; 217) configured to, upon actuation, transmit an alarm message over a wireless communication network, wherein said locator device (100; 200) comprises a battery (112; 212) connected to said wireless power receiver (111; 211) and wherein said wireless power receiver (111; 211) is an RF energy harvesting device configured to, upon reception of said electromagnetic waves, generate an electric current and provide said electric current to continuously recharge said battery (112; 212), and wherein said actuating unit comprises a transistor (114; 214), whose gate is connected to said wireless power receiver (111; 211), and an opto-isolator (116; 216) connected to said transistor (114; 214) and to said radio module (117; 217).