Model: MATEN 3.3G VRX with 3.3G Signal Alarmer Dimension: 52.3x87.5x14.7mm Frequency: 3083-3480MHz Channels: 40CH Input Voltage: DC12-36V(3-8S Battery) Antenna Connector: SMA Sensitivity: -98dBm Modes: VRX Mode, SCAN Mode Video Connector: 3.5mm coaxial Power Input: DC3.5mm/1.35mm Mounting Hole: 1/4; threaded hole Weight: 69g Frequency Bands A:3083,3114,3145,3176,3207,3238,3269,3300 B:3215,3235,3255,3275,3295,3315,3335,3355 C:3170,3190,3210,3230,3250,3270,3290,3310 D:3320,3345,3370,3395,3420,3445,3470,3495 E:3310,3330,3355,3380,3405,3430,3455,3480 VRX Mode: Switch to SCAN mode, the BAND button to cycle through frequency bands, and the button to change channels. Hold either button to activate auto-scan, which lock onto the channel with the strongest signal. SCAN Mode: Switch to SCAN mode to automatically scan all available channels. The strongest signal be displayed, and a beeper sound, increasing in speed as the signal strength increases. It's DIY kits, needs to finish by yourself. (Different batches may result in different printed labels, which not affect the use) Color: Black Material: ABS Package Contents: 1 * 3.3G Signal Alarmer Receiver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.