RadioMaster ER4 ELRS 4-channel PWM receiver — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/radiomaster-er4-receiver/  (sheet CC BY 4.0)
Basis: Manufacturer specifications (RadioMaster)
Catalog version: 2026-10-20

Overall (mm): length 30, width 15, height 5
- From RadioMaster's product page.
- True size, no printing tolerance added. Only published numbers are used; anything not published is said so.

dimension  value
Dimensions  30 × 15 × 5 mm
Weight  3.0 g
Outputs  4 CH PWM
Power  DC 4.5–8.4 V
Antenna  15 cm

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- RadioMaster: ER4 2.4GHz ELRS PWM Receiver — web — Publisher's page; dimensions are facts — https://www.radiomasterrc.com/products/er4-2-4ghz-elrs-pwm-receiver

Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/radiomaster-er4-receiver/index.json
API: https://xemstudio.com/api/geometry?object=radiomaster-er4-receiver