Keyring transmitter with 1 channel. Simultaneously transmits the encrypted code on 5 different frequencies, making it impossible for the remote to be interfered with or jammed. Uses frequency hopping spread spectrum (FHSS) One of the most secure remote controls on the market. Designed in Australia. Competitive pricing. Over 17 billion encrypted codes Operating range of up to 70 metres depending on building structure and receiver antenna 15mA (typical) at 3.3 Volts DC supply during transmission Battery life of 2 years with average use. Operating frequency: 433.100 to 434.700 MHz.