main engineSize: 95x42x23mmWaterproof grade: IP653 volume levels: 96dB for low range, 105dB for medium range, and 113dB for maximum rangeBattery type: 3 No. 7 batteries Battery life: 1-3 months of use at sunrise (approximately 6 months of continuous standby)Working frequency: 433.932+/-75KHz MHzWireless range: about 50M in open spaceRemote controlSize: 61x33x13mmBattery type: one 27A Alkaline battery Battery life.: Normal use exceeding 1 year (calculated by remote control 5 times per day)Working frequency: 433.932+/-75KHz MHzWireless range: about 50M in open space