The invention concerns transmitters and a portable receiver-buzzer with programmable triggering, hand-, voice-/sound- and pulse-operated, for remotely warning one or several persons. The inventive device consists of a receiver-buzzer case (16), a presence-detecting (23), telephone jack (30), entrance door (36), central transmitter housing (13) transmitting a coded signal to the reciever (20) triggering the motor-buzzer (21) and light-emitting diode (19). In the central transmitter housing (13) there are a clock (1), a voice/sound sensor (4), an alarm push-button (2), a presence detector push-button (14), a LED sector (8), two battery-controlled LED's (6 and 7), a switch button (5) for clock (1) and voice/sound sensor (4), an acknowledgement button (9), an alarm LED (2), a housing (11) for charging the receiver (20) battery, a potentiometer (10). The inventive device consists of a receiver-buzzer (16) wherein are a battery (22), a watch (18), three LED's (17), a receiver (20) receiving the coded signals from the transmitter triggering the buzzer (21). The device, by virtue of its functions, is designed for remotely warning in case of need, emergency or danger, any person equipped with a portable receiver-buzzer.