AD DETAILSEffective waterproof (IPX8) walkie-talkies for water sports or extreme sports. Great for teaching, or keeping in touch. Requires NO COVERINGS or outer waterproof boxes. Compatible to other UHF radio units. SIMPLE, LIGHT WEIGHT, EASY TO USE. Specification Range 100-300 meters for at sea-level (further at line of sight). Up to 5 km for hilltop to valley, Radio channel UHF- 400~480 MHz, 38-CTCSS With fixed channels as shown below: “477 MHz”for Malaysia Power of Transmission 0.5W for transmission Battery 1500 mAh Rechargeable lithium battery with protect circuit module Operating TimePTT time : about 90 mins (transmit)Incoming calls : about 180 mins (speaker enabled)Standby : about 30 hours ?Weight 70g ,net weight of SeaTalkie Size 101 mm x 44 mm x 21 mm , with fixed antenna Waterproof IPX8 graded waterproof. 3-meter for 3 hours, 5-meter for 30 mins. Self-developed technology. Require no coverings or outer boxesWarranty 1 Year Manufacturer’s Warranty.