When evaluating toy voice recorders, prioritize recording duration (typically 10 to 60 seconds for plush toys) and sound clarity (minimum 8kHz sampling rate). Ensure the battery type is appropriate; most use AG10 or AG13 button cells, which should be housed in a secured, screw-fastened compartment to prevent accidental ingestion by children. Additionally, check the trigger mechanism—options include pressure-sensitive buttons, light sensors, or motion activation—to ensure it matches the intended toy design.