Raspberry Pi Zero 2 W offers 2.4GHz 802.11 b/g/n wireless LAN and Bluetooth 4.2, along with support for Bluetooth Low Energy (BLE), and modular compliance certification. The board has a microSD card slot, a CSI-2 camera connector, a USB On-The-Go (OTG) port, and an unpopulated footprint for a HAT-compatible 40-pin GPIO header. It is powered via a micro USB socket. Video output is via a mini HDMI port; composite video output can easily be made available via test points if needed. Sharing the same form factor as the original Raspberry Pi Zero, Raspberry Pi Zero 2 W fits inside most existing Raspberry Pi Zero cases.
Power Monitor HAT is the latest product in the domain of SB Components that is the 3 Channel Current/Voltage/Power Monitor HAT For Raspberry Pi. It uses the I2C or SMBus interface for lightweight communication. It makes the process easy to monitor current, voltage, or power in each channel and also monitor the voltage between both sides of the sampling resistor.