Based on this product's specifications, here are some alternatives and similar models
Chainsaw Proline PROBUILDER 51800 — rear-handle model with cutting box
Summary description:
Proline PROBUILDER 51800 is a rear-handle chainsaw designed for cutting tasks. Identified by model 51800 (EAN 5709386518004), it features a rear grip configuration and a cutting box for managing the cutting chain and bar. Suitable for felling, limbing and general wood cutting in domestic and light professional use, it provides straightforward handling and maintenance.