Retevis Ailunce HA2 Ham Radio with APRS, Bluetooth, KISS TNC,APP Control GNSS, Compatible with Chirp, APRS Text Messaging, Smart Beacon,IP67 Waterproof Ham Radio Handheld, for Emergency, Outdoor ▶APRS text messaging; built-in APRS technology; peer-to-peer real-time text messaging over the air; enter messages directly using the keypad; share your real-time position over the air through local APRS gateways and connect to the wider APRS network. ▶KISS mode TNC update; KISS TNC is compatible with the APRS.fi APP and APRSDroid APP; and also compatible with SMSGTE; Winlink; Pinpoint; allowing you to send messages or email when cellular service is unavailable while sharing precise GPS coordinates over the air; tracking your off-grid team on your phone. ▶APP control; one-touch bluetooth pairing.