Ultrasonic range finder

Professional Electronic Measuring Tool receiver And TargetInstant, convenient and accurate to 99.5%at distances from 0.6m to 60m(max 75m) 2 WAYS TO MEASURE: RECEIVE ALONE TO 15M(MAX 18M). Receiver to Target tom(max 75m)Stores up to 5 measurements For indoor or outdoor use Can be field calibrated RANGE WITHOUT TARGET(JT-15): Min: 1ft 11 ins(0.6m) Max: 59ft(18m) Typical: 1ft 11 ins to 49 ft(0.6m to 15m) Actual: Will vary depending on environmental conditions RANGE WITH TARGET(JT-60): min: 3 ft 3 ins(1m) Max: 246 ft(75m) Typical: 3ft 3ins to 197 ft(1m to 60m) Actual: Will vary depending on environmental conditions ACCURACY: Single Unit Mode:99.5%(+/-1/4 in or +/-1m) Dual Unit Mode: 99.5% (+/-1/2 in or+/- 1m) These accuracies are possible when environmental conditions are as follows: Temperature: 32 to 86F (0 to 30 C) Relative Humidity: 30 to 70% Altitude : -328 ft to +328 ft(-0.1 to 0.1km) Wind Speed: Still Air