Connectivity and Compatibility Connectivity Technology: Wireless Bluetooth (commonly Bluetooth 3.0 + HS standards). Compatible Devices: Universal design, compatible with a wide range of smartphones (typically 4.5" to 6.8" screen sizes, or 6-9.5 cm width) running on Android, Windows, and iOS operating systems. Effective Distance: Operates within a range of up to 10 meters (in open space). Keyboard Specifications Keyboard Layout: Standard QWERTY layout. Number of Keys: Varies by model, but commonly around 78 to 80 keys. Key Type: Often laptop-style or scissor-foot construction keys. Key Life: Rated for a lifespan of up to 5 million presses. Interface: Usually a Micro USB port for charging.