87-108MHz Electronic FM Radio Walkie-Talkie DIY Kit

Note: This product is sold unassembled.

Build your own functional walkie-talkie and FM radio with this comprehensive DIY electronics kit. The finished device operates as a two-way intercom at 409.85MHz (approximately 200m range) and as an FM radio receiver covering 87-108MHz. Features BK4802P RF transceiver and RDA5807 radio chips, 0.96-inch OLED display, and clear audio quality. SMD components are pre-soldered – you only solder the through-hole parts. Perfect for radio enthusiasts, electronics students, and skill development.

A fully functional dual-mode device that works as a walkie-talkie (409.85MHz, ~200m range) and an FM radio kit (87-108MHz). Perfect for hobbyists, students, and anyone wanting hands-on RF electronics experience.

409.85MHz two-way radio DIY Application:

1. Electronics student: Learn soldering + RF concepts + get a useful device
2. Hobbyist: Fun weekend project with practical result
3. Teacher/instructor: Classroom or lab training on radio technology
4. Radio enthusiast: Build your own portable communication device
5. Parent & child: Supervised project to introduce electronics

RDA5807 intercom radio kit Specification:

1. Kit Name: Interphone Radio Electronic DIY Kit
2. Dual Function: Walkie-talkie + FM radio
3. Max Operating Current: ~200mA (volume max)
4. Power Supply: 3× AAA batteries OR 5V USB (not both)
5. PCB Dimensions: 95.5 × 61 mm
6. Walkie-Talkie Frequency: 409.85 MHz
7. Walkie-Talkie Range: ~200 meters (environment dependent)
8. FM Radio Frequency: 87-108 MHz
9. Radio Station Memory: Up to 30 stations
10. Volume Levels: 15
11. Display: 0.96" OLED
12. RF Chip: BK4802P
13. Radio Chip: RDA5807
14. Assembly: SMD pre-soldered; through-hole requires soldering

Features:

1. Dual Function: Integrated intercom (walkie-talkie) + FM radio receiver in one device.
2. Professional Chipsets: BK4802P RF transceiver for clear voice communication + RDA5807 radio chip for low-noise, high-sensitivity FM reception.
3. 0.96" OLED Display: Clear, easy-to-read screen shows frequency, signal strength, and settings.
4. Walkie-Talkie Specs: Operates at 409.85MHz with approximately 200 meters communication distance. Includes call alert function and signal strength indicator.
5. FM Radio Specs: Covers 87-108MHz band. Auto-search and store up to 30 stations. Power-off memory, 15 volume levels, and sleep mode.
6. DIY Assembly: SMD components pre-soldered. You solder the through-hole components – perfect for developing soldering skills.
7. Power Options: Three AAA batteries OR 5V USB power (do not use both simultaneously).
8. Pair Required: Two units needed for intercom function. Each unit works as a radio alone. Recommended to buy a pair.

What You'll Learn:

• Soldering through-hole components on a real PCB
• Reading schematics and following assembly instructions
• RF electronics basics – antennas, frequency bands, modulation
• Troubleshooting – if something doesn't work, you learn to fix it
• Calibration – adjusting for optimal performance

Walkie-Talkie Mode (409.85 MHz):

• Communication distance: Approximately 200 meters (line of sight, varies with environment)
• Voice activation: Press the intercom button to speak
• Call alert: Press "Call" button – the receiving unit rings
• Signal strength indicator: Know when you're in range
• Auto-detect: When idle, unit automatically listens for incoming signals

FM Radio Mode (87-108 MHz):

• Full FM band coverage: 87-108 MHz (standard commercial FM radio)
• Auto-search & store: Automatically finds and saves up to 30 stations
• Power-off memory: Retains saved stations after power down
• Station list management: Organize your favorite stations
• 15 volume levels: Adjustable to your environment
• Signal strength display: See which stations come in clearly
• Sleep mode: Conserves battery when not in active use
• Professional-Grade Chipsets for Superior Performance

BK4802P RF Transceiver Chip (Intercom Function):

• Excellent noise cancellation
• Strong audio processing performance
• Wide frequency band coverage
• Outstanding anti-interference ability

RDA5807 Radio Chip (FM Function):

• Low noise and high sensitivity
• Bass enhancement
• Strong anti-interference ability
• Automatic station search and storage
• Together, these chips deliver clear, intelligible voice communication and crisp FM radio reception.