S J Security Systems Pvt. Ltd. Manufactures Pin Hole Covert Camera with Audio. Pin Hole Covert Camera with Audio is a wall mounting type that ensures precise movement of camera. Useful for covert applications, only pin hole camera can be fitted in this. Audio is an optional feature in this Pin Hole Covert Camera. S J Security Systems Pvt. Ltd. Offered Pin Hole Covert Camera with Audio is available in PIR casing.