Operating Frequency50 KHzAudio Frequency2 KHzVoltage6V - 10.5VCurrent4.5mA (Stantby)Dimensions (L x W x CD)40 x 8.5 x 3cm (15.7" x 3.3" x 1.2")Weight400 grOperating Temperature-20ºC (14ºF) to 60ºC (140ºF)Humidity95%Battery9v AlkalineBattery LifeUp to 100 hours (Alkaline Battery)Warranty2 YearsBasic&..