Features: The industrial remote control adopts a design scheme of single-chip microcomputer coding and voltages stabilizing circuit, which improves frequency accuracy by 50% and reduces coding and data deviation by 15%. Type C charging port, not distinguishing between positive and negative, fast charging speed. Build in 500mAh high-capacity battery, with a battery service life of about 120 days on a single charge. Stable working frequency, with low repetition rate, strong interferences resistance ability, and recyclable charging. Quality ABS housing, drop proof, and long service time. The emission power is not less than 18dBm, and the remote control distance in open environment is about 200m, widely used in agricultural irrigation, outdoor lighting, industrial equipment, fish pond oxygenation, winches, electric hoists, etc. Specifications: Material: ABS+Metal Number of Button Key: 2-key, 4-key, 6-key(optional) Type: Number, Letter(optional) Size: about 15x4.86x3cm/5.90x1.91x1.18inch Modulation method: ASK Transmission power: 18dBm Encoding format: EV1527 Working frequency: 315/433.92MHz Working voltages: DC3.7V Battery type: build-in battery Package Includes: 1pc Industrial Remote Controller note: Just remote, other accessories demoed in the pictures are not included. Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.