A computer-implemented method, comprising: receiving, at a first device (104, 300, 400, 502), an indication of user input to cause the first device (104, 300, 400, 502) to establish a wireless data connection with another device; determining, at the first device (104, 300, 400, 502), that one or more sensors (306, 406, 408, 520) on the first device (104, 300, 400, 502) are oriented toward a second device, comprising obtaining, at the first device (104, 300, 400, 502), an identifier for the second device, the identifier obtained as a result of the one or more sensors on the first device (104, 300, 400, 502) being oriented toward the second device while the second device is located in front of the one or more sensors on the first device (104, 300, 400, 502), wherein obtaining the identifier for the second device comprises: detecting, with the one or more sensors on the first device (104, 300, 400, 502), a line-of-sight signal emitted by the second device, wherein the one or more sensors on the first device (104, 300, 400, 502) are arranged to: (i) detect the line-of-sight signal when the one or more sensors are oriented toward the second device and are located within a path of the line-of-sight signal, and (ii) not detect the line-of-sight signal when the one or more sensors are oriented away from the second device or are located outside of the path of the line-of-sight signal; and determining, by the first device (104, 300, 400, 502) and based on information encoded in the line-of-sight signal, the identifier for the second device; in response to (i) receiving the indication of user input to cause the first device (104, 300, 400, 502) to establish a wireless data connection with another device and (ii) determining that the one or more sensors (306, 406, 408, 520) on the first device (104, 300, 400, 502) are oriented toward the second device, establishing a first wireless data connection between the first device (104, 300, 400, 502) and the second device; receiving, at the first device (104, 300, 400, 502) and over the first wireless data connection from the second device, a first stream of audio data; and causing audio encoded in the first stream of audio data to be played through one or more speakers (302, 304; 402, 404) of the first device (104, 300, 400, 502). receiving, at a first device (104, 300, 400, 502), an indication of user input to cause the first device (104, 300, 400, 502) to establish a wireless data connection with another device; determining, at the first device (104, 300, 400, 502), that one or more sensors (306, 406, 408, 520) on the first device (104, 300, 400, 502) are oriented toward a second device, comprising obtaining, at the first device (104, 300, 400, 502), an identifier for the second device, the identifier obtained as a result of the one or more sensors on the first device (104, 300, 400, 502) being oriented toward the second device while the second device is located in front of the one or more sensors on the first device (104, 300, 400, 502), wherein obtaining the identifier for the second device comprises: detecting, with the one or more sensors on the first device (104, 300, 400, 502), a line-of-sight signal emitted by the second device, wherein the one or more sensors on the first device (104, 300, 400, 502) are arranged to: (i) detect the line-of-sight signal when the one or more sensors are oriented toward the second device and are located within a path of the line-of-sight signal, and (ii) not detect the line-of-sight signal when the one or more sensors are oriented away from the second device or are located outside of the path of the line-of-sight signal; and determining, by the first device (104, 300, 400, 502) and based on information encoded in the line-of-sight signal, the identifier for the second device; detecting, with the one or more sensors on the first device (104, 300, 400, 502), a line-of-sight signal emitted by the second device, wherein the one or more sensors on the first device (104, 300, 400, 502) are arranged to: (i) detect the line-of-sight signal when the one or more sensors are oriented toward the second device and are located within a path of the line-of-sight signal, and (ii) not detect the line-of-sight signal when the one or more sensors are oriented away from the second device or are located outside of the path of the line-of-sight signal; and (i) detect the line-of-sight signal when the one or more sensors are oriented toward the second device and are located within a path of the line-of-sight signal, and (ii) not detect the line-of-sight signal when the one or more sensors are oriented away from the second device or are located outside of the path of the line-of-sight signal; and determining, by the first device (104, 300, 400, 502) and based on information encoded in the line-of-sight signal, the identifier for the second device; in response to (i) receiving the indication of user input to cause the first device (104, 300, 400, 502) to establish a wireless data connection with another device and (ii) determining that the one or more sensors (306, 406, 408, 520) on the first device (104, 300, 400, 502) are oriented toward the second device, establishing a first wireless data connection between the first device (104, 300, 400, 502) and the second device; receiving, at the first device (104, 300, 400, 502) and over the first wireless data connection from the second device, a first stream of audio data; and causing audio encoded in the first stream of audio data to be played through one or more speakers (302, 304; 402, 404) of the first device (104, 300, 400, 502).