Higher Performance to Price Ratio than SRF08/SRF10 Ultrasonic Ranger-KS101B/KS103 dural Transducer Ultrasonic Range Sensor with Temperature compensation and I2C Bus(Easy I2C Connection; 20 I2c address can be changed; ranging 1cm to 6.5m, the dead zone is 1cm, the accuracy is 1mm-10mm within 4.5m; the shortest detection time is 1ms,and max. 32ms only for 5m detection; power-saved mode: Sleep automatically after 5s without commands, waken up by master at any time.),Small Size: KS101B:L50mmxW24mmxH17mm; KS103/KS103S:L42mmxW20mmxH17mm; Light weight: 11gPacking details:1) 1pc into polybag with anti-static function+1 silica gel, then into one polyfoam bag;2) 1pc/inner box, box size: 85mmx80mmx32mm;3) N.W: 12g; G.W: 25g.