Car Mount Hoco CA104 Telescopic with Arm Extension 4.7″-7″. The Hoco CA104 is a telescopic mount, which is capable of keeping your mobile phone stable while driving and can be adjusted either vertically or horizontally, depending on your preference. Its design is compact and durable, making it ideal for use in cars, and also its arm extension provides extra usage and comfort while driving. Compatible with 4.7″-7″ mobile phones.