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Color box size: 19.5 * 14.5 * 7.7cm, 468g/piece Box size: 55 * 32 * 35.5cm, 20 pieces per box, approximately 10.5kg/box F13 specification parameters: Host/Host Wireless probe Wireless FM Part Wireless probe dimensions: L130.7 * W79.8 * H19mm Weight: Approximately 150g Display screen type: Color Sunshine LCD screen Display screen size: 2.8 inches Language: Chinese/English/French/Russian Measurement unit: meter/foot Charging voltage: DC5V Working temperature: -10~60 ℃ Storage temperature: -20~70 ℃ Detection depth range: 0.8~60m Sonar frequency: 125KHz Sonar radiation angle: 105 degrees Dimensions: ø 68mm Weight: Approximately 90 grams Charging voltage: DC5V Working temperature: -10~60 ℃ Storage temperature: -20~70 ℃ Charging time: about 2 hours Wireless link distance: 100 meters (in an unobstructed environment) Wireless frequency: 433MHz Dimensions：L5.15*W3.15*H0.75 inch Weight:：About 150g Resolution：240*320 Display Size：2.8 inch Language：English / Chinese/French/ Russian Units：Metric /British Charging voltage：DC5V Working temperature：14~140℉ Storage temperature：-4~158℉ Detection depth range：2.6-200ft Sonar Frequency：125KHz Sonar angle：105 degree Dimensions：ø2.7inch Weight：About 90g Charging voltage：DC5V Working temperature：14~140℉ Storage temperature：-4~158℉ Charging time：About 2h Maximum connection distance：300 feet (In an obstacle free environment) Wireless frequency : 433MHz