Battery
1. Does the device have a battery?
2. Can the battery be charged?
3. Can the battery be changed?
Updatable
1. Can the device software be updated?
2. Is it due to storage limitation that the device cannot be updated?
Cryptography
1. Does the device perform cryptographic operations? (e.g. software update decryption/validation)
2. Does it rely on a hub or a base station for updates validation?
Interfaces
1. Does the device have a display? (which can be used for Bluetooth pairing codes for instance)
2. Does the device have the ability to input authentication information?