The most popular and best Bitcoin/altcoin hardware wallets are:
Ledger Blue is the most advanced hardware security gear on the market. It boasts multi application execution, and packs enterprise-level crypto-capabilities into a lightweight handheld device designed and crafted in France. It is architected around a Secure Element, featuring a touchscreen and USB & Bluetooth* connectivity.
Price: 274.80 €
The Ledger Nano S is the cheapest of the three hardware wallets with a screen . Ledger, one of the most well-known Bitcoin security companies, released the device in August 2016.
KeepKey was released in September 2015 and was the second hardware Bitcoin wallet to offer a screen. The KeepKey’s larger screen gives it some extra security features that the Nano S and Trezor lack.
Price: Currently unavailable.
TREZOR launched in August 2014 as the first Bitcoin hardware wallet, offering secure bitcoin storage plus the ability to spend with the convenience of a hot wallet. TREZOR is a small, thumb-sized device with screen. The number of TREZOR-compatible services is growing rapidly and here’s the nearly complete list.
There is new TREZOR 2 model coming in august 2017! Proto in pictures.