Joiwo’s large Payphone type Prison telephones are designed to provide vandal resistant communication for waiting rooms, dormitories, gate and entry ways for jails, prisons, and other institutions. Joiwo’s Payphone size Wall Mount Telephones are specifically designed for high vandalism areas subject to fraud and abuse. The unit is constructed of rugged stainless steel and equipped with tamper resistant security screws for added strength and durability. This telephone could use an instruction card to guide people how to operate. 1. Standard Analogue phone. Phone line powered. 2.304 stainless steel material shell, high mechanical strength and strong impact resistance. 3. Vandal resistant handset with Internal steel lanyard and grommet provides added security for handset cord. 4. Zinc alloy keypad with volume control button. 5. Magnetic hook switch with reed switch. 6. Zinc Alloy Connector with flexible rotation and reliable connection. 7. Optional noise-canceling microphone available 8. Wall mounted Simple installation. 9. Weather proof protection IP54. 10. Connection: RJ11 screw terminal pair cable. 11. Multiple colors available. 12. Self-made telephone spare part available. 13. CE, FCC, RoHS, ISO9001 compliant. Price: US$290.00-$310.00/ Set 10 Sets (Min. Order) Check out our titles today by logging into our website https://www.joiwo.com/Jail-Phone/durable-prisons---jails-direct-connect-armored-handset-corded-telephones---jwat148