1, 4 functions: unidirectional/full open/full lock/automatic 2, self-learning, 16 kinds of codes 3, CE ... Remote transmitter with 4 keys to carry out the 4 functions of autodoor, including: unidirectional/ full open/ full lock/ automatic ... absorberTransmitting and receiving method: Microwave level with a roller codeRemote control battery action: 1≥ 8000 timesWorking environment temperature: -42 ...