A peripheral device for connecting to a host includes a body and a peripheral connector attached to the body. The peripheral connector is connectable to a connector of the host. The peripheral device is configured to facilitate manual attachment to the host and to impede manual detachment from the host. Also provided a peripheral device that includes a body, a first connector connectable to the host connector and a second connector connectable to a connector of an add-on peripheral device; where the body, the first connector and/or the second connector are configured to facilitate manual attachment to the host and to impede manual detachment from the host.