This is a home use airconditioner wall split air conditioner and world famouns brand rotary type compressor. High efficient internal thread copper pipe for condensor and evaorator, LED digital display, best visibility, self-diagnose capability, error code showing for detection convenience, intelligent defrost, independent dehumidification, sleep mode, quiet operation, low voltage startup, auto-protection, auto restart, optional voltage: 220V/50Hz/60Hz with CE ISO9001 ISO14001 standard.