How to Say "handheld device" in Spanish
The Spanish word for “handheld device” is “terminal” — B1 level.
English → SpanishB1
nounB1
point-of-sale machine

Examples
Necesitas abrir un terminal para ejecutar ese comando.
You need to open a terminal to execute that command.
El terminal de pago no funciona; solo aceptan efectivo.
The payment terminal is not working; they only accept cash.
Gender Shift
When referring to a computer or device, 'terminal' is generally masculine (el terminal), contrasting with the feminine used for travel stations (la terminal).
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