HP 855843-371 is an 8 GB DDR4 memory module for laptop memory expansion. The listing identifies it as Hynix A d, with a 2400 MHz data rate for systems that support this memory specification.
Its compact 260-pin SO-DIMM format is intended for compatible memory slots. The module is unbuffered and non-ECC, and its rated voltage is 1.2 V. These details describe its form and operating type; the listing does not name specific laptop models.