The module is used for charging of single lithium battery or multiple lithium batteries in parallel, and the charging port can take power from the USB port. output USB micro usb input / usb output / and charging lipo
Iteaduino Tiny is a mini development board based on Attiny85 master, which is cheap, compact and easy to use with low power consumption. The mainboard is a derivative board with reference to digispark design, and it supports use of specific Arduino IDE and uses Arduino syntax for programming which is quite convenient.
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.
This Grove-ultrasonic sensor is a non-contact distance measurement module which is compatible with the Grove system. It’s designed for easy modular project usage with industrial performance.
Video available here