Máy bộ đàm dưới nước GSM G.divers Wireless

Máy bộ đàm dưới nước GSM G.divers Wireless .
Product Description

• Simple PTT (Push To Talk) system - press the microphone button to talk and release to receive
• Single Channel, Standard frequency - making it possible to talk directly with all other Ocean Reef communication systems
• Powered by a 9 volt battery  - not included (see below to order)
• Up to 30 hours in the receiving mode
• Range of up to 600 feet