| 摘要 |
A self-powered, compact intelligent device senses the proximity of a consumer and draws their attention by emitting either a low level beeping sound or a 5-15 second or longer "audible commercial" or other audio/visual signal while simultaneously presenting promotional material. This point-of-purchase coupon dispenser POP-CD offers the consumer the convenience of individual, point-of-purchase coupons for immediate use. |
