1. CBS19: powered by 9V dry battery (battery is not included), non-rechargeable
2. CSB20: built-in lithium battery, rechargeable
3. Use ultrasound to stop dogs from barking, and the punishment is more humane than electric shock
4. Effective range 50 feet
5. 1 test gear, 1-3 three different levels of ultrasonic continuous interval working gear
6. Small and concealed
7. Two-color indicator light, which emits red light when ultrasonic. The green light flashes during standby working time.
8. Train the dog not to bark
9. Stop dogs from barking while camping
10. Weight: about 100 grams
11. Color box packaging size: 8x6.3x5 cm

Switch and 4 levels of operation:
OFF: used to save battery
Test: used to verify the function of the microphone and speaker
1: Short-distance monitoring (15 feet)
2: (up to 30 feet)
3: High sensitivity (50 feet)