You should check the mounting possibilities if needed.In high-security scenarios, you might go for signature pads where the encryption of the sensitive signature row data takes place on the pad, rather than in the unsafe “computer” environment.You might want an option for data encryption between the signature tablet and the PC.An LED that indicates the operation mode (Off / No connection to a computer, Stand-by, Signature recording) can be helpful.You should expect a coordinate accuracy of ± 0.5 mm (center).The screen resolution should be at least 600 LPI (not interpolated). The Huion H420, for example, is the smallest possible drawing pad you should go for: At 6.96 by 4.40 inches it can be considered a rather small device, but it still allows you to get work done, especially if you’re inside a place where space is rather restricted.The pen pressure levels should be at least 256 levels (not interpolated). Patented cordless, battery-free pen with 1024 levels of pressure sensitivity to accurately capture the unique signature profile, including biometric data.The sampling rate should be a minimum of 100 points per second.In special scenarios, where no USB port is available, you might need a serial accessory kit. For some manufacturers, touch sensors are wear parts and thus not covered by the guarantee. The used sensors should have a long life and should not wear off as a result of scratches or mechanical impacts.The LCD screen should only react to the pen and not to accidental touches by the hand or finger.If you use LCD screens, real-time visualization of the signature on screen is a must. Secure Digital (SD) card A type of memory card used in digital cameras, tablets, cell phones, MP3 players, digital camcorders, and other portable devices.
In addition to the x/y position of the pen, the tablet must also record the pressure-flow during the writing process.
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