In 1971 The Nintendo Light Telephone was released to capitalize on the walkie talkie and CB radio craze. Each handset included a telescope to allow precise aiming of the light beam at the solar cell receiver on the other handset, although a tripod would be needed at long range.

The Light Telephone was priced at 9,800 Yen (approximately $27 at the 1971 exchange rate)

 

(beforemario.com)