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To further increase the applicability of Bluetooth in real applications, reducing the energy consumption and hardware cost are important research topics. In this paper we examine the trade-off between power consumption and performance for our experimental prototype, which has been implemented based on commercial Bluetooth off-the-shelf components. Performance analysis shows that the use of the sniff mode is compatible with the use of multi- slot data packets. However, when the channel conditions require selecting single slot data packets, the sniff mode could have a negative impact on performance, and so the power/delay trade-off must be taken into consideration. Our prototype has been used in a museum application to support ubiquitous computing between devices without requiring a priori knowledge of each other.