How do I quickly connect my keyboard with multiple smartphones?
Bluetooth Easy Pairing makes connecting your keyboard with up to three devices easier; press and hold one of the F7, F8 or F9 keys for 3 seconds until pairing starts. Follow on-screen instructions on each smartphone to pair them. (Page 5)
From the official Samsung EJ B3400 Smart Keyboard Trio 500 manual, page 5
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