I bought this device with a hard case, three-blade and four-blade attachment plus USB charging cable.First of all: The battery lasts well and you can also use the device well in a humid environment (shower). Nevertheless, two things bother me a bit. You won't get the advertised 90 seconds! Definitely not with a four-blade attachment. The performance here with the four blades is just too mediocre for me. You have the feeling that the device has to "nibble" its way through it and on the way back it realizes, 'Oh, there is still hair stubble.' ... And not just once. Therefore: Certainly not 90 seconds.Why is the charging socket necessarily the one for a shaver, if it runs out to a USB-A plug at the other end anyway and the device has to be charged with the conventional USB specifications, mandatory?! (Five volts at one ampere.)This cannot be explained by tightness alone, because in Japan, for example, all smartphones MUST be waterproof at the connection and even there the things have a USB-C port.If you want to buy the charging cable for the shaver, you are first faced with a 'zoo' of cables to choose from and don't know which plug is the right one. (See photo of the original plug: width = 1 cm, height = approx. 4 mm, depth of the notch length = 1 cm)One star deducted, because the performance of the engine is a bit weak, for my conditions and expectations.