Bite Indicators

DW
1) Wireless transmitter
2) Variable tone and volume controls
3) Double LED's indication
4) 20 seconds' memory
5) Large size buzzer
6) Powered by alkaline 9V battery
7) 80m - 200m transmitting distance and 433MHz
8) 16 channels in order to not disturb the other anglers

GMY
1) Variable tone and volume controls 
2) Double LED's indication
3) 20 seconds' memory-large size buzzer
4) Powered by alkaline 9V battery
5) Double LED's indication in green at night instead of fluorescent light
6) Transmit with digital output
7) Jack plug socket with ease
8) Transmitter and receivers LED synchronize with sound Automatically

GSYS
1) Color
2) Changing LED's indicates
3) 20 seconds' memory
4) Tone-changing prompt and tone and volume controls
5) Large size buzzer
6) Ultra-low power consumption
7) Only the receiver supplied with alkaline 9V battery 
8) The transmitter can work without any battery
9) Transmitter and receiver's LED synchronize with sound automatically
10) Double LED's in green at night instead of fluorescent light
11) Ultra-low power consumption