Raspberry Pi 3 Model B+
The Raspberry Pi 3 Model B+ is the latest product in the Raspberry Pi3 range, boasting a 64-Bit quad core processor running at 1.4GHz, dual band 2.4GHz / 5.0GHz wireless, Bluetooth 4.2/BLE, faster Ethernet and PoE capability via a separate PoE HAT. The dual band wireless comes with modular compliance certification...
If you are searching an ultrasonic ranging module, the HC-SR04 is good choice: Its stable performance and high ranging accuracy make it a popular module in electronic market. It's cheaper than an IR range finder with similar range accurancy and distance.