Most 1506HV 4MB boxes do not have built-in Wi-Fi. You will need an external USB Wi-Fi antenna, usually the MT7601 model.
The Sunplus 1506HV is a highly integrated System-on-Chip (SoC) designed for digital satellite set-top boxes (STBs). The "4MB" refers to the size of the SPI Flash memory, which stores the firmware (software). While 8MB and 16MB versions exist for more complex Android-based boxes, the 4MB version is optimized for lightweight, fast, and efficient "Mini" or "Full HD" receivers. Core Specifications Sunplus 1506HV (High Efficiency) Flash Memory: 4MB RAM: Integrated DDR2/DDR3 (typically 512Mb or 1Gb) Resolution: Supports Full HD 1080p via HDMI Tuner: DVB-S2 (Full S2 compliant for HD satellite signals) sunplus 1506hv 4mb s2 full
You can plug in a USB flash drive to record live TV or use the Timeshift feature to pause and rewind. Most 1506HV 4MB boxes do not have built-in Wi-Fi