Odaily Planet Daily reports that hardware and software company Arx Research has announced the completion of a $6.1 million seed funding round, led by Castle Island Ventures, with participation from Inflection, Placeholder, Seed Club Ventures, and 1kx. Arx Research co-founder and CEO Cameron Robertson stated that the round used a SAFE (Simple Agreement for Future Equity) structure, but did not disclose the funding timeline or post-money valuation. The new funds will support the company's launch of a handheld point-of-sale device that integrates digital assets with traditional payments.