Geekworm Raspberry Pi UPS, X728 V2.1 (Max 5.1V 6A) 18650 UPS & Power Management Board with AC Power Loss Detection, Auto On & Safe Shutdown Function for Raspberry Pi 4B/3B+/3B June_2023_update You can use the key

You can use the key tracker around the house or in your garden

The lighting area is 11

Ideal for people with chronic respiratory diseases such as asthma or COPD

CF RS MMC Memory Cards

high safety level

Geekworm Raspberry Pi UPS, X728 V2.1 (Max 5.1V 6A) 18650 UPS & Power Management Board with AC Power Loss Detection, Auto On & Safe Shutdown Function for Raspberry Pi 4B/3B+/3B June_2023_update You can use the keyGeekworm Raspberry Pi UPS, X728 V2. 1 (Max 5. 1V 6A) 18650 UPS & Power Management Board with AC Power Loss Detection, Auto On & Safe Shutdown Function for Raspberry Pi 4B 3B+ 3B Description Document: wiki. geekworm. com X728User_manual Update History: X728 V2. 1 is released at October 15th 2021 at amazon. (Note: there maybe mixed version of X728 V2. 0 and V1. 3 at amazon warehouse, please understand.) Update: New add a buzzer controled by CPIO20. DC