The difference and development prospect forecast of analog interphone, digital interphone and public network interphoneWhen the walkie talkie was just facing the market, it was an analog walkie talkie
The difference between rugged PoC smartphone and ordinary Walkie talkieWalkie talkie is a kind of mobile dialogue tool. At present, walkie talkie can be divided into three categories: PoC radio, analo
Explosive environment: an environment (gas and dust) that may explode. Any place involving the production, processing, handling, storage, and transportation of explosive substances may form an explosi
Nowadays, with the increasing popularity of smart phones and the continuous expansion of application scenarios and functions, smart phones have become an indispensable part of people's daily life.
The following waterproof grades refer to international applicable standards such as IEC 60529, GB 4208, GB / T 10485-2007, DIN 40050-9, ISO 20653, ISO 16750, etc1. Scope: the waterproof test includes