50MHz-4GHz Low Noise Amplifier (LNA) for Ham Radio - 0.6dB NF, -110dBm Sensitivity | RF FM HF VHF/UHF Signal Booster | Compatible with USB Camera Modules & Radio Equipment | Perfect for Amateur Radio, Signal Reception & Weak Signal Detection

Features:This is a under-voltage automatically charging controller used to charge storage battery in the event of the voltage dropping below a set value. When the battery voltage increases to a set value, the controller will automatically stop charging. Designed with a LED indicator to show if it is charging. Both under-voltage and over-voltage value can be adjusted by simply pressing buttons. This controller will help you to protect battery from over-discharging and prolong battery life. Specifications: Suitable Battery: 12V storage/lithium battery Power Supply Voltage: DC12V Control Voltage: 12V-120V Control Current: 20A Control Precision: 0.1V Voltage Error: ±0.1V Size: 7.9*4.3*2.7cm/3.1*1.7*1.1in Weight: 40g(approx.) Restore to Factory Setting: At normal state, press and hold S1 and S2 buttons together, till display shows 888, to restore to factory setting. Package Includes: 1 x Battery Charging Controller