Two loudspeakers interconnected: 1. Long press the play/pause button to turn on both speakers, 9 lights flash, and the speakers enter the connection state. 2. Press and hold the M key of one of the speakers (this one is the main speaker), and after about 10 seconds, the other (sub speaker) will sound "boom", indicating that the connection is successful. At this time, the indicator light of the main speaker continues to flash ( Waiting to connect to digital devices), the secondary speaker light is always on. 3. Turn on the blue open device, search for "K07". Click to connect. After the connection is successful, the speaker will emit a "dong" sound. The connection is successful. 9 lights are always on. If the two speakers have been connected to the digital device separately, please turn off the Bluetooth of the digital device before connecting the main and auxiliary speakers. If the battery is low, the pairing may fail. Please charge it before pairing. 4. To cancel the couplet, first disconnect the Bluetooth from the digital device, then press and hold the M button of the main speaker, and disconnect the couplet when you hear the prompt tone. At this time, the lights of the two speakers flash slowly.